HTH Spa 86121 Clarifier, Concentrated Spa & Hot Tub Chemical for Crystal Clear Water, 16 oz

Very easy to use an economical to use. It was recommended to me by another person who uses it and I’m very happy with it.

Finally a product that does what it promises. I drained/refilled spa two weeks ago and it clouded up a few days later. Ph and Chlorine were fine. Tried to shock with Renew to no avail. Put 4oz of this in my 500 gal spa and overnight milky, cloudy water turned clear. Best $10 I ever spent.

I actually messed up when buying this because I didn't realize it was for the spa, but I poured it in my pool skimmer and hopes it would clear up some into my surprise the next day the pool is completely clear again so it turned out be a positive mistake LOL

Good product seem to clean out the hot tub

Wow this product works great!!! It cleared my water in under 30 min. Wow what a ring of gook was left. Easy wiping off now my water is perfectly clear and clean!

Good product. I've used it for a long time

Works great, water is so clear in my spa

Works as advertised !