AquaDoc Spa pH Decreaser for Hot Tub - 32oz - Sodium Bisulfate Spa pH Down for Water Balance - Made in USA

So far so good, this works to lower PH as it says and keeps the water balanced to maintain clarity. It does not have any offensive odors. I basically add a sploosh of it when i add chlorine to my hot tub!

As described

Good quality

It worked, however it did actually take the whole bottle to decrease the alkalinity to a point where it was in the ok range. Once I added soda ash to increase the ph, the alkalinity just went right back up.

It only takes a small amount (1 oz) to correctly adjust the pH level in our hot tub. How easy is that?

I love how this lowered the PH in my hot tub!

I have the aquadoc testing system and figured since the app gives recommendations tailored to their products I would purchase this PH down. I was a little apprehensive since this was liquid and not powder but I figured I would give it a try. App said add 2 oz but the bottle said add 1 once at a time and then test in 30 minute so that is what I did. Four ounces later and the PH didn't budge at all. Since I ran out of time I started bright and early the next day 16 ounces later and PH didn't budge. I finally got the PH to come down but that was after using the entire bottle, and then it was too low which started a who new fiasco. The powder may work better, I don't know but the liquid was a waste of time and money.

The instructions are clear and it works like a charm when I use it in my spa. I’m new to owning an inflatable spa, so just learning all of the chemicals is a challenge