Rated 4.72 out of 5 based on 18 customer ratings
(18 customer reviews)

pH and Alkalinity Down – 1.25 lb

$18.98 $15.53

Keep hot tub water in check. Hot Tub Things pH and Alkalinity Down helps you obtain the proper balance needed to fully enjoy your hot tub.

Hot Tub Things pH and Alkalinity Down is designed to lower both alkalinity and pH of your spa or hot tub. Ideally, the total alkalinity should be between 80 and 150 ppm, and pH between 7.2 and 7.8.

Use: pH Down should be used as necessary when pH levels are above 7.8.

Note: For best results, dissolve granular products first by adding to a small, container of water. Then, apply the solution to the spa water.

  1. Make sure all equipment is OFF.
  2. Add 1/4 oz. (1-1/2 tsp.) pH Down for every 500 gallons of spa water.
  3. Turn ON circulation system for 30 minutes.
  4. Retest water. If pH is still above 7.8, repeat steps 1-3.

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SKU: 850511004215 Category: Tags: ,


The Power of pH

Hot Tub Things pH and Alkalinity Down helps you balance your spa’s, hot tub’s, or swim spa’s water. Use Hot Tub Things ph and Alkalinity Down when your water’s pH level is higher than 7.8.

Proper balance
Keep hot tub water in check. This product lowers pH and Alkalinity to obtain the proper balance!
Purest solution
Formulated Exclusively for Hot Tubs And Made from the Purest Chemicals Available
#1 Trusted Brand
Hot tub Things is America’s #1 Trusted Brand of Hot Tub Chemicals
Multiple benefits
The product lowers pH to prevent corrosion, optimize sanitizer effectiveness, reduce eye irritation.
Guaranteed Performance
Safety Tested to Assure Quality, Guaranteed Performance
Maintain or decrese your pH
Add the appropriate amount of product to maintain the pH level or raise the level up

Additional information



18 reviews for pH and Alkalinity Down – 1.25 lb

  1. Rated 5 out of 5


    One product that reduces both alkalinity and PH. It’s easy to use and works great! In the past we have always bought two products to reduce alkalinity and PH, but decided to give this one a try. It works better than the separate products in just one dose. One and done! Super pleased and will continue to purchase this product for our hot tub going forward.

  2. Rated 4 out of 5

    Larry L, Rubendall

    Have use this product in my home spa for the last three years, it has never failed to bring down the Alkalinity level to the acceptable level called for.

  3. Rated 3 out of 5

    Donald J.

    My alkalinity was running high in my hot tub and I didn’t see anything else but this to try. My pH was low, so I don’t like that it lowers both alk and pH. I was running in the next color past the “OK” area on the test strip chart and I had to use 8 doses to move the alk at all. It is difficult to use, takes a half hour to register, it is very toxic out of the container… I am keeping my eye out for something better.

  4. Rated 4 out of 5

    Pug lover

    works great

  5. Rated 5 out of 5

    Larry M. Swails

    Works as described

  6. Rated 5 out of 5

    Daniel Price

    Does what its suppose too!

  7. Rated 4 out of 5

    James Bogard

    Works good

  8. Rated 5 out of 5

    Phyllis J.

    Reduced the pH and Alkalinity as promised.

  9. Rated 5 out of 5

    Amazon customer

    Worked as advertised. I am happy!

  10. Rated 5 out of 5

    Hello all.

    Hi there, This really works!

  11. Rated 5 out of 5


    Awesome product for keeping my hot tub maintained.

  12. Rated 5 out of 5

    Amazon Customer

    Received the item in a timely manner and am happy with the product.

  13. Rated 5 out of 5


    Fast shipping, great price and product.

  14. Rated 5 out of 5

    Johnnie & Mel Cunningham

    Spa use and does as stated

  15. Rated 5 out of 5

    M. Gifford

    Fast delivery…. great price

  16. Rated 5 out of 5



  17. Rated 5 out of 5

    Deyonne M. Knight

    Great Product. Great service

  18. Rated 5 out of 5


    Worked fast.. I used about half as much to lower it the same. Almost went TOO far down because I was used to stuff that didn’t work. I will purchase again when I run out.

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