Watkins Vanishing Act Calcium Remover for Hot Springs Spas - 76029

Expensive, but works really well.

Only softener I will use in the hot tub. It’s a little pricey but worth it. I use a filter to fill my hot tub and the water is still hard. I drop one of these in and the next morning the hot tub is where I want it. Simple to use, serves it purpose well, great product.

Product showed up wet, like it had been already used

I took this thing and sat it so it partially blocked the intake to my heater. I left it there for 2 days. My hardness level was lower. I think I can get a couple more uses out of it. It's far less expensive than other solutions. Again my main problem was hard water and I could not control my pH because of it. It's better now.

I have a hot springs hot tub, so I need to use these "pillows". Tried looking for a generic version, but struck out. They work well, but expensive. Directions tell you to just use once, but I typically use them about three times. So far, that approach seems to work well

This softened the water in my 400 gallon spa in 45 minutes. Afterwards, I left the bag out to dry in the sun on a hot day and put it back into the plastic bag and stored in a cool & dry location. One year later… it softened the water in my 400 gallon spa again. I plan to do this until it no longer softens the water in my 400 gallo spa… but I’m seeing at least 4 cycles out of this thing.

I am not quite sure how well this has worked as of yet. We are currently using it. Our concern is that the vanishing act was wet inside the bag. Very unusual since we’ve been using this product from a local vendor for years and never had this occur before

Worked exactly as promised.