In Colorado, high altitude, low humidity, and constant wind can accelerate this natural rate. To determine definitively if your pool is experiencing normal evaporation or an actual structural leak, Colorado Pool and Spa can perform a 24-hour bucket test to compare the water levels.

Understanding Normal Pool Water Evaporation Rates

When managing a property, noticing a lower water line can be a common concern. Before worrying about major repairs, it is important to rule out the most common natural process. Water evaporates constantly.

Property owners frequently ask how much water evaporates from pool surfaces under standard conditions. The following table outlines typical natural water loss for an uncovered pool in a temperate climate:

The exact rate of this water loss depends heavily on three main factors:

• Surface Area: Larger pools have more water exposed directly to the air.
• Direct Sunlight: Constant sun exposure naturally heats the water and speeds up the process.
• Water Temperature: A heated pool left uncovered will naturally lose more water than an unheated pool because the warm water molecules are highly active and escape into the air at a faster rate.

The Colorado Climate Effect on Water Loss

National averages and standard estimates do not perfectly apply to every environment. When handling routine pool and hot tub maintenance, Colorado property owners must factor in a highly unique, demanding climate that actively accelerates water loss.

Colorado offers an environment that naturally causes residential pools and spas to lose water at a significantly higher rate than they would in humid, sea-level locations. The table below breaks down the specific localized environmental factors driving this rapid evaporation:

Because of these intense local factors, what looks like a potential structural leak might simply be a standard summer week in the Rockies.

How to Perform the Bucket Test

Before starting, ensure there is no rain forecasted for the next 24 hours, as precipitation will skew your results. Here is how to execute the test step by step:

1. Bring a clean, empty five-gallon plastic bucket to your pool deck.
2. Fill the bucket with water directly from your pool until the water level is about an inch or two from the rim.
3. Place the bucket carefully on the first or second step of your pool. The water level inside the bucket should closely match the water level outside the bucket. Ensure the bucket is heavy enough to remain stable and will not tip over.
4. Turn off the pool pump, the heater, and disable any automatic fill valves. Wait a few minutes for the water surface to become completely calm.
5. Mark the exact water level on the inside of the bucket using a piece of waterproof tape or a dark permanent marker.
6. Mark the pool water level on the outside of the bucket using the exact same method.
7. Turn your pool pump and normal circulation equipment back on to resume daily operation, but keep the auto-fill valve disabled.
8. Leave the bucket in place and wait exactly 24 hours. Keep the pool uncovered during this entire period to allow for maximum natural evaporation.
9. After a full day has passed, return to the pool and check both of your marks.

Reading Your Bucket Test Results and Next Steps

If the water level went down by the exact same amount inside and outside the bucket, your water loss is entirely due to natural environmental evaporation. You do not have a leak. You can top off your pool, turn your automatic fill valve back on, and feel completely confident that your plumbing and shell are secure.

If the pool water level on the outside of the bucket dropped significantly more than the water level on the inside, your pool is actively losing water somewhere in the system. The bucket experienced normal evaporation, but the pool experienced evaporation plus a leak.

Frequently Asked Questions About Pool Evaporation

Does a pool lose more water at night or during the day?

Pools often lose more water at night, especially in climates with significant temperature drops like Colorado. When the ambient air temperature falls below the temperature of the heated pool water, the evaporation rate accelerates. The warm water essentially turns to vapor and escapes into the cold, dry night air.

Will a solar cover stop my pool water from evaporating?

Yes, utilizing a high-quality solar cover or a solid winter cover will drastically reduce water evaporation. By creating a physical barrier between the water surface and the open air, a cover can prevent up to ninety percent of normal water loss. This is one of the most effective ways to conserve water and heat.

How do I know if a pool leak is in the plumbing or the shell?

You can run a secondary bucket test to narrow down the source. Perform the test once with the pool pump running for 24 hours, and then again with the pump completely off for 24 hours. If the pool loses more water while the pump is running, the leak is likely in the plumbing lines. If the test indicates a plumbing issue, reviewing our guide on emergency hot tub and pool repair will help you understand the next steps.

Is it safe to let my pool water level drop below the skimmer?

No, allowing the water level to drop below the skimmer intake is dangerous for your pool equipment. If the skimmer pulls in air instead of water, the pool pump can overheat, lose prime, and eventually burn out the motor. Always keep the water level halfway up the skimmer opening.

The post How Much Water Evaporates From the Pool? appeared first on Colorado Pool + Spa Scapes.

What This Means for Pool & Spa Owners

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If you notice two or more of these symptoms occurring simultaneously on your property, your system is likely compromised. Catching these early indicators is crucial to preventing extensive structural and foundational damage. Colorado Poolscapes can help you ensure your investment is protected.

The Core Signs of a Pool Leak

Homeowners often sense something is wrong before they can pinpoint the exact mechanical issue. Because underground plumbing and concrete shells hide most of the water volume, you must look for secondary symptoms. Reviewing this detailed checklist will help you determine if your suspicions of a hidden issue are justified.

1. Water loss beyond the evaporation baseline

It is critical to differentiate between natural water loss and a genuine plumbing failure. We have previously detailed how to perform a bucket test to establish your normal evaporation baseline. If your pool is dropping more than a quarter to half an inch of water per day, and the bucket test confirms the loss is unequal, you are dealing with an active leak rather than standard environmental evaporation.

2. Soggy or spongy ground around the perimeter

When water escapes from an underground return or suction line, it saturates the surrounding soil. If the landscaping near your pool deck is constantly muddy, or if grass is growing unusually fast and green in one specific, isolated patch, water is escaping underground. You may also notice the ground feels distinctly spongy when you walk near the equipment pad.

3. Unexplained spikes in the water bill

Modern swimming pools often feature an automatic fill valve designed to maintain a perfect water line. While this is a great convenience, it can easily mask a massive problem. If your auto-fill is constantly running to keep up with a hidden underground leak, the water level will look perfectly normal. The first place you will see the impact is on a shockingly high monthly utility statement.

4. Equipment short-cycling or running dry

The filtration system relies on a consistent water level to operate safely. When an active leak drops the water level below the skimmer intake, the pool pump begins to pull in air. This causes the equipment to gurgle, lose prime, and run completely dry. If you constantly hear your pump struggling or notice it turning off due to thermal overload, the water level is failing to support the system.

5. Settling concrete and new structural cracks

Water escaping into the ground does not just disappear. It actively washes away the compacted dirt and gravel supporting your pool shell and surrounding concrete deck. Over time, this erosion causes the heavy concrete to settle unevenly. If you notice new, widening cracks in your deck, or if a section of the patio has suddenly dropped and created a tripping hazard, a leak is likely washing away the foundation below.

The Colorado Climate Factor: Freeze and Thaw Damage

In warmer southern climates, plumbing failures are typically caused by simple age or standard wear and tear. However, managing pool and hot tub maintenance in Colorado properties involves entirely different environmental stresses. Our mountainous region experiences dramatic temperature fluctuations that trigger a highly destructive freeze and thaw cycle in the soil.

• Groundwater expansion during winter freezes applies significant pressure to pool shells and underground PVC lines.
• Rapid soil shifting and settling during the spring thaw stresses plumbing joints and accelerates structural cracking.
• The aggressive movement caused by this cycle often results in active leaks that reveal themselves after the spring thaw.

When to Schedule a Professional Inspection

Finding a single sign, like a slight drop in the water level, might prompt a simple observation period. However, if two or more of these signs are actively present on your property, that is a highly credible reason to stop guessing and seek a definitive answer.

A professional detection appointment validates your concerns and answers the question in a few hours. Specialized listening devices and pressure testing equipment can pinpoint the exact location of the water loss without unnecessarily tearing up your landscaping or concrete deck. To learn more about this diagnostic process, review our professional leak detection services or read our specific guide to pool and spa leak detection in Colorado to understand the next steps for securing your property.

Frequently Asked Questions About Pool Leaks

Can a swimming pool leak fix itself over time?

No, a structural or plumbing leak will never repair itself. In fact, ignoring the problem allows water to continuously wash away the supporting soil beneath your deck. This constant erosion leads to larger, far more expensive foundational cracks and shifting. Prompt professional repair is always the safest and most cost-effective strategy.

How much daily water loss indicates a real leak?

As a general rule, losing more than a quarter inch to half an inch of water per day is a strong indicator of a potential problem. If you find yourself replacing more than two inches of water in a single week, you should perform a bucket test immediately or call a professional to investigate the system.

Are underground pool leaks covered by homeowners insurance?

Most standard homeowners insurance policies do not cover the direct cost of repairing the pool leak itself, especially if the root cause is gradual wear and tear or poor maintenance. However, some specific policies may cover the collateral property damage caused by the escaping water. You must consult your specific insurance provider to verify your coverage limits.

Is it safe to continue swimming in a leaking pool?

It depends entirely on the severity and the exact location of the leak. A minor plumbing drip near the equipment pad might not pose an immediate danger. However, a major structural shell leak or a failure near an electrical conduit is highly dangerous. It is always best to keep everyone out of the water until a qualified technician assesses the system.

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For hot tub owners managing pool and hot tub maintenance in Colorado at elevation, that last cause is the one most guides miss, as well as the one most likely behind water that keeps clouding back up.

Here at Colorado Pool + Spa Scapes there’s always a Colorado-specific answer.

Chemistry Imbalance

Test before you add anything. Adding product to water you have not tested is the fastest way to worsen cloudiness and make the next adjustment harder.

Three parameters control clarity.

• pH (target 7.2 to 7.6): high pH causes dissolved minerals to precipitate and cloud the water. Low pH corrodes equipment and makes sanitizer unpredictable.
• Total alkalinity (target 80 to 120 ppm): alkalinity stabilizes pH. When it swings, cloudiness follows.
• Sanitizer (chlorine 1 to 3 ppm, bromine 3 to 5 ppm): A low sanitizer level allows bacteria and organic matter to accumulate quickly.

Adjust in this sequence every time: alkalinity first, pH second, sanitizer last. Give the water 24 hours to settle after correcting all three, before concluding that chemistry is not the issue.

Clogged or Degraded Filter

A filter that cannot trap particles leaves them suspended in the water. This cloudiness is usually uniform, like frosted glass rather than the hazy appearance a chemistry problem produces.

Inspect and Clean

Remove the cartridge and look at it directly. A visible grey or white coating needs a full rinse with a garden hose. If rinsing does not restore the pleats to their original shape, soak overnight in a dedicated filter cleaning solution.

Replace the filter if it has been in service more than 12 months, if the pleats are torn or collapsed, or if a chemical soak does not restore it. After cleaning or replacing, run circulation for several hours before retesting.

Poor Circulation

Chemistry balanced, filter clean, water still cloudy – check flow. Hot tubs need consistent water movement to push contaminants through the filter. When the flow slows, particles remain suspended rather than being captured.

Check that all jets are operating at normal volume and that the pump sounds correct. In Colorado mountain properties, fine mineral sediment and pine debris can partially block the intake without being obviously visible. Check the intake before assuming the pump is the issue.

Calcium Scaling: The Cause Most Guides Skip

Colorado mountain source water is quite hard. Water with more than 120 mg/L of dissolved calcium and magnesium is hard, and much of the Roaring Fork Valley exceeds that level at the tap.

When calcium hardness rises above 300-400 ppm, dissolved calcium precipitates from solution. The water turns milky white and does not clear with shock or sanitizer adjustment. This is mineral precipitation, and no chemical fix resolves it.

If you are also working out your next drain date, learning how often to change hot tub water in Colorado is just as important.

Reading Your Calcium Hardness

Standard test strips do not accurately measure calcium hardness. Use a liquid drop-test kit. The target range for a hot tub is 150-250 ppm. Above 300 ppm, add a sequestering agent. Above 400 ppm, a partial or full drain is the only reset.

The Altitude Factor

At elevations above 6,000 feet, sanitizers off-gas faster due to lower atmospheric pressure, according to the Pool and Hot Tub Alliance. More frequent chemical additions mean more dissolved byproducts accumulating in already mineral-heavy water. Tubs at altitude accumulate calcium hardness faster than standard drain intervals account for.

Pool and hot tub maintenance in Colorado, built for mountain elevations, tracks calcium hardness as a core metric and not an afterthought. Owners who manage chemistry without measuring it will see cloudiness return regardless of how well they balance sanitizer and pH.

Cloudy Water That Keeps Coming Back?

If “why is my hot tub water cloudy” is a question you ask every few weeks, a different chemical is not the answer.

Recurring cloudiness in mountain tubs almost always comes from one of three ongoing conditions:

• Calcium hardness that is never being tested
• A drain schedule that does not match the actual bather load
• Water passes the point where chemistry can control it

These do not show up on a basic strip test and do not resolve with one-time treatment.

Pool and hot tub maintenance in Colorado, built for mountain properties, tracks calcium hardness, adjusts for altitude, and runs on a schedule that matches how the tub is actually used.

A quick conversation can answer any questions you may have to keep you enjoying that warm, relaxing soak in your own home.

FAQ: Cloudy Hot Tub Water

Why is my hot tub water cloudy after adding chemicals?

Adding chemicals to unbalanced water can worsen cloudiness. Sanitizers fail outside the correct pH range. Adjust alkalinity first, then pH, then sanitizer. Wait 24 hours before further additions. Persistent cloudiness after balancing indicates a dirty filter or high calcium hardness, requiring mechanical cleaning or a water reset rather than more chemicals.

Can hard water cause cloudy hot tub water?

Hard water is common in Colorado. When calcium hardness exceeds 300-400 ppm, minerals precipitate, causing milky cloudiness that doesn’t respond to chemicals. Use liquid drop-test kits for accuracy, as standard strips often fail. Proper maintenance requires monthly calcium testing to prevent mineral scaling at mountain elevations.

Why does my hot tub water keep getting cloudy?

Recurring cloudiness in Colorado mountain tubs stems from ongoing issues, not simple one-time fixes. The common causes are unmeasured calcium hardness, a filtration schedule inadequate for the bather load, or overdue water replacement. If cloudiness returns within a week, addressing the underlying condition, not just chemistry, is required.

How long does it take to clear cloudy hot tub water?

Most cloudy water clears within 24 to 48 hours after correct diagnosis. Chemistry issues resolve quickly after sequence-adjusted balancing. Filter-related cloudiness takes longer as filtration improves. Cloudiness from calcium scaling or high Total Dissolved Solids (TDS) requires a partial or full drain; chemical treatment will not resolve it.

The post Why Is My Hot Tub Water Cloudy? appeared first on Colorado Pool + Spa Scapes.

In Avon, Glenwood Springs, and the Roaring Fork Valley, the question of how often to change hot tub water has a different answer than you will find on most national sites.

Colorado Pool + Spa Scapes gives you the real Colorado-specific answer, and a simple way to know exactly when your water is ready to go.

The 3 to 4 Month Standard – and Why It Does Not Tell the Full Story

Most manufacturers and industry bodies recommend a full drain and refill every 90 to 120 days. The Pool and Hot Tub Alliance bases this on how quickly total dissolved solids (TDS) accumulate in a typical tub under average conditions.

TDS is the core issue. Every time someone soaks, they introduce body oils, sweat, lotions, and organic matter. Your sanitizer breaks those down, but the byproducts remain dissolved in the water. Over time, TDS climbs past the point where chemistry can be reliably controlled, no matter what you add. The PHTA sets the practical threshold at 1,500 ppm above your fill-water baseline.

How Colorado Changes the Equation

For hot tub owners in the mountains, understanding pool and hot tub maintenance in Colorado starts with recognizing what makes this environment different.

Sanitizers Work Less Efficiently at Altitude

At elevations above 6,000 feet, which covers Avon, Glenwood Springs, Basalt, Carbondale, and most of the Roaring Fork Valley, lower atmospheric pressure causes chlorine and bromine to off-gas more quickly. You need more product to hold the same residual sanitizer level. More chemical input means more dissolved byproducts building up in the water faster. The effective water life is shortened even with consistent maintenance.

Colorado Mountain Water Is Hard

Water with dissolved calcium and magnesium above 120 mg/L is hard water, and much of Colorado’s mountain water by far exceeds that. That mineral load goes straight into your tub when you fill it. Calcium carbonate scales heaters, jets, and plumbing over time and frequent top-offs during summer only make it worse.

UV Exposure Speeds Evaporation and Chemical Loss

Colorado sees over 300 sunny days per year, and high-altitude UV is significantly stronger than at sea level. Outdoor tubs lose water to evaporation faster, which means more frequent top-offs with fresh fill water. Each top-off dilutes chemistry slightly but does not reset TDS. The net result is that chemical inputs increase and effective balance time decreases.

Vacation Properties See Concentrated Bather Load

Many tubs in mountain communities serve vacation rentals or second homes, just sitting quietly for stretches, then running continuously during peak rental weeks. That pattern is one of the hardest to handle in water chemistry. A tub used intensively over a long weekend by multiple guests without pre-soak showers can accumulate more TDS in 48 hours than a residential tub accumulates in a month.

A Colorado-Adjusted Drain Schedule

Rather than a single calendar-based answer, here is a practical framework based on how mountain tubs actually get used:

Test TDS monthly regardless of use type. A basic digital TDS meter costs under $20 and removes the guesswork entirely. When your reading exceeds your fill water baseline by 1,500 ppm, it’s time to drain it.

Signs Your Hot Tub Water Needs Changing Now

Sometimes the water tells you before the schedule does. Do not wait for a date if you are seeing these.

• Foam returns within minutes of shocking, high TDS and organic load; chemistry cannot break it down
• Water stays cloudy after balancing, filter saturation, or TDS overload. The only fix is fresh water
• Strong chemical smell with correct sanitizer levels, combined chlorines or bromamines building up
• Skin irritation or eye redness after soaking, pH or sanitizer imbalance that repeated adjustments are not fixing
• TDS reading 1,500+ ppm above your fill water baseline, the chemical threshold for a drain

If two or more of these are present at once, do not wait. Drain, clean the shell, and refill.

What to Do at Each Water Change

A full water change involves specific steps.

• Before draining, flush the jets for 20 minutes.
• Drain fully, clean the shell, and rinse filters.
• Refill through the filter housing to avoid airlocks.
• Finally, balance alkalinity (80-120 ppm), pH(7.4-7.6), and sanitizer (1-3 ppm chlorine or 3-5 ppm bromine)
• In Colorado, always add a sequestering agent to manage hard water and prevent equipment scaling.

Colorado Pool + Spa Scapes handles hot tub and pool maintenance for mountain property owners throughout the valley, including full drain-and-refill service with post-fill chemistry tailored to your source water and elevation.

Not Sure Where Your Water Stands? We Can Help

Figuring out how often you should change hot tub water is easier when you are not doing it alone. For mountain property owners in the Roaring Fork Valley, the Vail Valley, and surrounding areas, Colorado Pool + Spa Scapes offers pool and hot tub maintenance in Colorado built specifically for elevation, hard water, and the seasonal use patterns that make mountain tub ownership different.

Colorado Pool + Spa Scapes serves hot tub and pool owners throughout the Roaring Fork and Vail Valleys, as well as surrounding mountain communities. If your tub is overdue for a drain or you want a maintenance schedule built around your elevation and usage patterns, Colorado Pool + Spa Scapes is the local team that knows what mountain water can do to equipment.

FAQ: How Often to Change Hot Tub Water

How often should you change the water in a hot tub in Colorado?

Colorado owners should drain hot tubs every 2 to 3 months. High altitude, hard water, and UV exposure accelerate chemical breakdown and TDS buildup. Vacation rentals may require changes every 4 to 6 weeks. Monitor TDS monthly; a full drain is required once levels exceed your baseline by 1,500 ppm.

What is the formula for calculating how often to change hot tub water?

The standard formula for calculating the water-change interval is to divide the tub’s gallon capacity by 3, then divide that result by the average number of daily bathers, which yields the interval in days. For example, a 400-gallon tub with two daily bathers suggests a 67-day change. In Colorado, use this formula conservatively and rely on monthly TDS testing for confirmation.

Can you add fresh water instead of draining it completely?

Partial additions dilute TDS but won’t reset it. Topping off is a temporary fix that doesn’t restore chemical balance once TDS is elevated. A full drain-and-refill is the only true reset, which is especially critical in Colorado given the naturally high mineral content of mountain water.

How do you know when the hot tub water has passed the point of no return?

Drain your tub if TDS levels exceed your baseline for fill water by 1,500 ppm. Physical indicators include persistent foam after shocking, cloudy water that won’t clear, strong chemical odors despite proper levels, or skin and eye irritation. If two or more symptoms appear, a full reset is necessary.

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If you have been waiting for reliable hot tub delivery, the timing has never been better. Spa manufacturers have fully recovered from the production delays of recent years, and shipping timelines are back to normal. That means your new hot tub can arrive in as little as six to eight weeks.

For Colorado homeowners, that puts your backyard soak within reach before winter sets in.

What to Expect with Hot Tub Delivery

At Colorado Pool & Spa Scapes, we manage the process from purchase to professional installation. Once your spa arrives, our team coordinates delivery, placement, and setup to ensure everything is installed correctly and safely.

When you order a new spa, we help you plan for:

• Electrical requirements

• A level and solid foundation

• Access for delivery

• Site preparation for mountain or high-altitude properties

Our team walks you through every step so there are no surprises when your hot tub arrives.

You can explore our full selection of models on our hot tubs & spas page to compare features, seating layouts, and energy-efficiency options.

In-Stock Hot Tubs Available Now

If you are on a tighter timeline, we also carry a selection of in-stock hot tubs ready for faster delivery. With proper site preparation, installation can often be completed within weeks.

For buyers who secure an in-stock model before mid-November, installation may be completed before the holidays, provided electrical and foundation work are ready.

If you are unsure whether your property is ready, our team can guide you or connect you with professionals to prepare the site.

Why Timing Matters in Colorado

Winter weather in Vail, Aspen, Steamboat Springs, and surrounding mountain towns makes reliable delivery and installation especially important. Freezing temperatures and snow can complicate setup if planning is delayed.

By ordering early, you avoid seasonal rushes and ensure your spa is ready when you need it most.

If you are also considering upgrades such as a custom hot tub cover or long-term spa maintenance services, we can coordinate everything at the time of delivery so your system is protected from day one.

Start Your Hot Tub Delivery Process Today

A warm, relaxing soak in your own backyard is closer than you think. With production timelines stabilized and inventory available, now is the right time to secure your new spa.

Call 970.945.8775 to speak with our team about current models, delivery timelines, and installation scheduling.

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Losing water? If your spa or pool is losing ¼” of water daily that is not from evaporation, it could be a sign of a potential problem. If you notice higher water bills, cracks in the pool shell, or soft spots in your deck, you may have a troublesome leak in your plumbing or shell. Using state of the art equipment, our team of specialists can locate and repair leaks and stop the damage. 

Call to schedule a time for one of our professionals to assess your situation.

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Let our pros analyze your spa and pool water for an accurate assessment of your water balance. Our analysis provides personalized step-by-step instructions for maintaining a clean and healthy environment.

Our stores are open Monday – Friday, 8am to 4pm. Stop by with a sample of your water anytime for quick results! We are also offering 25% OFF in store on all pool and spa chemicals and supplies for a limited time (covers and service are not included).

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Did you know your spa should be drained and cleaned every 3-4 months and that your spa filters should be replaced annually? With warmer temperatures coming to the valley, it’s a great time to get your spa ready to soak! We offer a “drain and clean” service to help you with maintenance. We’ll flush the grime from your spa plumbing, clean your spa cover and assess for any issues. Performing regular maintenance will ensure your investment delivers soaking enjoyment for years to come!

Call to schedule a time to drain & clean your spa and we will be happy to replace your spa filter upon request.

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The enjoyment of warm therapeutic waters, ultimately leading to the creation of modern day hot tubs, has an interesting history!

• Early hot tubs were held in calderas or volcanic craters and used as baths carved of solid granite.
• 1700s – Native Americans embraced the healing waters in various parts of the United States.
• 1800s to early 1900s – Resort spas begin popping up in Europe and the US.
• mid 1900s – Post WWII, wooden spas became popular, some even made of wine barrels!
• 1960s – Concrete spas with jets enter the scene at a high cost.
• 1960s – 1970s – Acrylic spas gain popularity.
• 1979 – Sundance Spas opens manufacturing in Costa Mesa, CA and creates industry firsts such as: recessed jets, Whirlpool Therapy Jets, Rigid Bond shell construction (still used today), and many specialized hydrotherapy jets. 

For more firsts, take a look at the history of Sundance Spas.

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