pH Decreaser | pH Down | Pool, Hot Tub and Spa pH Reducer | Sodium Bisulfate |High Alkalinity | Prevents Scale Build Up | Pool, Hot Tub and Spa Chemicals | Indoor and Outdoor | 3 lb

The first brand I bought of pH reducers came in a liquid. Yeah. It took the whole bottle of liquid to lower my tub to the correct pH, due to our water source. Luckily, this comes as a powder, which goes much further, which saves me money. Awesome!

Don’t waste your money on those expensive ph minus chemicals. This did the trick for a fraction of the cost and I hardly used any. It’ll probably expire before I use it all. Excellent product.

Works as advertised does a little goes along way.

It worked to lower my ph but I had to use the whole bottle instead of half. No problem since I don't like buying liquid muriatic acid.

Worked great. Wouldn't buy anything but this from here on our! Stabilizer both oh and alaklinity!

It changes the ph the way we need it to

I can always tell without testing when my pool is to alkaline. This product only requires a very small amount and it reduces the ph. My skin is not nearly as dry after using this.

Seems to decrease the ph as it is intended. Leaves a small amount of residue on the bottom of my spa but does its job