AquaDoc Spa Stain and Scale Control for Hot Tubs, 32 oz

Great product! Much better than jack’s magic blue stuff, and Leslies no metal. Works quicker and doesn’t make water cloudy.

Worked well to remove stains in my spa. Probably would work the same in my pool but needed more then 1gal for the size of pool.

My daughter had friends over last night for a late night pool party. This morning when I looked at my water it looked a little murky & the pool already had stains prior despite getting it cleaned professionally every Friday. This morning I poured the whole 64 oz bottle into the spa & pool and both my daughter and I are pleasantly surprised how clean, clear, and sparkly the pool & water look after running the quick clean process on the pool for the last 2-hours. I give this 5 stars, 100%, and two thumbs up! I confirm that it works efficiently and does what it promises!

Cheaper than top brand but you need to use more

Wonderful! Does a great job. We have purchased it several times.

Let me start out by stating the product works. We have very hard water here in Arizona and after application of the product it is correcting the scaling on my pool tiles. However, the dosage instructions are confusing. Here on Amazon, the instructions say to apply at a rate of 8 ounces per 10,000 gallons of pool water. There is nothing stated in the instructions to let you know if that dosage is the initial dosage for a problem pool or weekly maintenance. The instructions on the bottle call for 2 ounces per 500 gallons. Significantly more. That same 10,000 gallon pool would require 30 ounces of the product. Nothing on the bottle says anything about maintenance or initial dosage, but having to put 30 ounces of this chemical in my pool every week as maintenance would break my bank account. I emailed a question to the seller who very promptly replied that the instructions on the bottle are for treating a pool with obvious problems and then to maintain with the 8 ounce lower dosage every week as per the Amazon instructions. If you were to follow Amazon's instructions with only putting 8 OZ into the pool initially in a problem pool, you will probably think the product is ineffective and have disappointing results . Go high first then low and you'll see the product does work.

My salt pool stopped making chlorine after using this product, I thought. Turns out, it contains phosphonic acid which turns to phosphates when reacted with chlorine. The phosphates then promote algae, which even further increases chlorine demand. I can't believe this is a pool product. Now I have to keep treating for phosphates until the product is gone from the system over the next weeks and months.

I am not convinced this works and for my pool 15’x30’ 1 gallon is gone after one month. I added the product upon receiving it and then again after two weeks. My calcium build up was not significant since the pool is only seven months old but was hoping this would be a preventative for our notoriously hard water in Arizona. Honestly no difference and did not remove the stains and very expensive to add monthly. Have to find a better solution that works short of draining the pool and having a service bead blast the tile.