Just 1oz takes care of the cloudy water in the hot tub. We are avid users of our 15 year old hot tub. We forget to shower before and we have lotion on to help with dry skin. So this make a good addition to the products that we use. I use vinegar and baking soda for ph and alkalinity balance.

I don't like to use MPS as it interferes with my testing kit for chloramines. This is a good natural alternative. It seems to help with with chloramines and I use less then one ounce per week in my 350 gallon spa.

I use on cloth to clean surfaces

I first used this product after my spa water was cloudy but still had acceptable ph and alkalinity levels. Our spa is lightly used. I applied it per directions and it was good to go the next morning when I popped the cover off.

#sweepstakes First time user, and four stars may become five after more experience. This met all my expectations after a few less than satisfactory attempts to stabilize my Hot Tub. Consistency without twice daily checking is important to me, and using this weekly has made other fine tuning adjustments less needed. I bought another bottle already!