Hot SpringWatkins Vanishing Act Calcium Remover Spas - 76029

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.

We empty and refill our hot tub a few times per year and we always use these because we have hard water. It's soften the water as to not cause damage to the hot tub.

When we got our hot tub, I used one of these pillows for 24 hours from our spa dealer and the hardness was sufficiently reduced. I have now ordered one from this vendor, and it arrived with water droplets in the plastic bag. It has not reduced the hardness at all in 24 hours. Not sure if the vendor isn't storing or shipping this properly, but the product is not working this time.

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.

Hardness in my hot tub was at 28ppg.I bought two of these and used as instructed.Hardness is now at 12ppg.I will be using these in the future when the water gets replaced and hardness is too high.