12 oz Pure Enzymes for Spas (monthly treatment) - Waters Choice

12 oz Pure Enzymes for Spas (monthly treatment)

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  • 12 oz. Pure Enzymes for Spas/Hot Tubs (monthly application)
  • 12 oz Pure Enzymes for Spas (monthly treatment)
  • 12 oz Pure Enzymes for Spas (monthly treatment)
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Switching Over to Waters Choice Enzymes

If you are switching over to Waters Choice enzymes from a chlorine or bromine based system, make sure your water is clean/clear, less than 60 days old and then simply let your chlorine/bromine level come down to 1ppm or less before introducing our enzymes.

If you are switching over from or are still using a Salt Generator, simply turn you generator down to the lowest setting or you may stop using it altogether.  Your plates and equipment will last longer, when using Waters Choice enzymes.

What is Pure Enzymes for Spas?

Pure Enzymes for Spas is a monthly spa treatment for up to 500 gallons. Enzymes treat spa water filled with organics like sunscreen, sweat, urine, and debris from plants and trees. These organics put a high demand on chlorine, which means you must increasingly use more. Waters Choice Spa Enzymes will break down the organics in your water, freeing up the chlorine to do what it does best. This allows you to use less chlorine, which is so much better for you and your spa.

All You Need

Start with clean filters.  Then add 1 (12oz.) bottle per month, balance pH (7.2 - 7.8) & alkalinity (80 - 120)  and maintain .5 -1 ppm chlorine.  One - 12 oz. bottle of Pure Enzymes for Spas treats 500 gallons per month.  This application is great for any spa, including built-ins and inflatables.

If your spa is less than 500 gallons, we still recommend using the full amount of enzymes. This is because there are typically the same about of bathers using a smaller tub as there are a larger tub, but with a smaller amount of water, resulting in more concentrated amounts of organics.

If your spa is more than 500 gallons, you will need to add more Spa Enzyme.

If your hot tub holds more than 500 gallons, you will either need to -

  1. Add 1 1/4 bottles every month or
  2. Add 1 full bottle every 3 weeks instead of every 4 weeks.

However, if you have a Swim Spa (usually 1000 gallons and up), then you need to use the Swim Spa Enzymes, which are specifically formulated for the nuances of a swim spa.

Cleaning and Draining

Maintaining your spa with Waters Choice Enzymes enables you to go a full year before you need to clean and drain your spa. Traditional chemical systems require you to clean and drain every 3 months. The difference is that enzymes break down and "eat up" organics, thus removing them from the water. Chlorine/bromine systems sanitize the organics, but do not remove them, causing a build up of organic sludge in the pipes that must be purged from your plumbing.  Chemicals also build up in your spa water and must be removed by dumping the water periodically. 

When it is time to clean and drain your spa, we highly recommend using Clean & Drain to purge your plumbing before you drain.  Purging with Clean & Drain will ensure that you are starting over the cleanest spa possible, eliminating previous issues that may have caused water clarity issues as well as curbing any potential start-up problems.

Note about Phosphates

If your water ever gets a tint of green, we highly recommend testing for phosphates which will cause algae bloom. If your phosphate level is 200 ppb or more, you will need to add a phosphate remover.

Additional Benefits

Our enzymes are scientifically formulated to combat organics in your spa water without the harsh chemicals, eliminating scum rings and enabling filters, equipment and swim suits to last longer.

Enzymes can withstand large bather loads and recover quickly.  They are all natural and safe for your eyes, hair, skin, pets and the environment.

No shock, clarifier, metal-remover, scale preventer, or any other harsh chemicals needed. 

Important Difference in Spa Enzyme Products

Please note that the 12 oz. Pure Enzymes for Spas and the 2 oz. Spa Enzyme Concentrate can be used interchangeably, but are not used together at the same time.


  • Model: WC-12
  • UPC# 650429310503
  • Shipping Weight: 0.75lbs
  • Manufactured by: Waters Choice, Inc.


Easy Instructions Start with clean, clear water or purge with Clean & Drain a…


Easy Instructions

  1. Start with clean, clear water or purge with Clean & Drain and refill with clean water. (no irrigation water).
  2. Turn your spa on and set filtration to a minimum of 8 hours/day (first 6 weeks).
  3. Set heat to desired temperature.
  4. Check pH and alkalinity and adjust if needed. Add 1 capful of pH product, run spa for 1 hour, then retest. Adjust again, accordingly. pH should be between 7.2 & 7.8
  5. Wait for spa to warm up.
  6. Check pH and alkalinity again and adjust if needed. (Check frequently in the first month until pH stays stabilized, then check once a week.)
  7. Add 1 bottle of Waters Choice 12 oz. PURE ENZYMES for SPAS. This enzyme treatment is doing most of the work keeping your spa clean. Make sure to add another bottle every month thereafter!
  8. Add Waters Choice Sanitizer (granular chlorine). Follow recommended label rates. (We recommend 2 tsp. every other use)
  9. CLEAN filters (with high-pressure hose) 1x per week for the first 6 weeks! After that, clean every other week.
  10. Use your new spa.
  11. If at any time you have questions about your water care, please contact support@waterschoice.com or text us through our chat bubble in the lower left hand corner.
    Important Note: If your hot tub holds more than 500 gallons, you will either need to -
  • Add 1 1/4 bottles every month or
  • Add 1 full bottle every 3 weeks instead of every 4 weeks.

8 Reviews

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  • Michael J Barnett - Dec 4th 2021

    Did the job!


  • Linda M Smock - Feb 2nd 2021

    Pure Enzymes

    Great product, we love it. Water's Choice products are the best. Fast shipping and I love that they enclose a personalized thank you note.

8 Reviews

  • Michael J Barnett - Dec 4th 2021

    Did the job!


  • Linda M Smock - Feb 2nd 2021

    Pure Enzymes

    Great product, we love it. Water's Choice products are the best. Fast shipping and I love that they enclose a personalized thank you note.

  • Bonnie L Johnson - Jan 11th 2021

    Great System

    We have used the enzymes in our spa for 6 months. We love the fact we do not need a lot of chlorine. We like the way our skin feels after a spa visit.

  • Bonnie L Johnson - Oct 13th 2020

    Silky smooth skin

    This is the best way to treat our spa. Love the feel of my skin after being in our spa!

  • Darleen Hahn - Sep 22nd 2020

    Pure Enzymes for Spa

    I have used this product for several years now and it is the BEST for maintaining my spa chemical balance.

  • Albert Vickers - Sep 17th 2020

    no problems

    easy to use

  • Stephen Eberle - Aug 26th 2020

    Pure spa Enzymes

    Works great !

  • Chris Mandeville - Dec 15th 2019

    Waters Choice is the best I have used!

    We have had a hot tub for over 2 years now in Portland, OR. We started out using the Leisure Time products recommended by the hot tub retailer. This included chlorine, spa up, spa down, shock, calcium and occasional use of a defoaming product. We had to use a lot of chemicals to keep the water balanced and clean.
    Our hot tub dealer mentioned Waters Choice as an alternative that used a natural enzyme and would require less chemicals. We slowly transitioned over, and now have been on Waters Choice for over a year now. It is nearly impossible to review these products individually since they are part of a water maintenance system. Thus, I am really reviewing this product the Water Choice system of which this product is a part.
    1. We definitely use less chemicals and save money. Usually, we need to add a little bit of chlorine every few uses. Sometimes we need a little spa down to decrease the PH. We add a capful of the (Spa Enzyme Concentrate) every 2 weeks and our water stays really nice! No more shock, calcium or de-foamer products needed.
    2. We only have to change the water every 6 months to 9 months. Our water would not stay nice as long with the old products.
    3. This is definitively subjective, but the water just FEELS cleaner and nicer. It does not get the odor is would occasionally get using the old products.
    1. I feel their instructions could be a little more clear and consistent. For example, they could consistently provide measurements in terms of capfuls instead of ounces, tablespoons, teaspoons, etc. It is a lot easier for most of us to measure out 1/4 or 1/3 capful rather than 2 oz or 2 tablespoons.

    Give it a try for yourself!

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