Adding calcium

[Randrx2]

Does anyone else do this when adding chemicals? For example, this is a 20 pound bag of Calcium Chloride, but at only 94.8%. So in PoolMath, I put I added 18.96 pounds. It’s only a 4ppm difference, but the nerd in me likes to be exact!

 

[PoolStored]

Nope. Toss it in, mix, test 4 hours later. It's always the test that tells.

 

[proavia]

You have a vinyl liner pool and a CH of 120 already.
No reason to increase calcium - unless you have a heater.

 

[Randrx2]

You have a vinyl liner pool and a CH of 120 already.
No reason to increase calcium - unless you have a heater.

Understood.

Bringing it up to get in line with salt cell recommendations (200-400).

Also, experimenting if it will affect freezing point in winter since I don’t close pool. I know it takes much higher TDS levels, but only looking for one degree. Long shot.