Low Calcium Hardness

[manzalone]

Ordered my test kit but it hasn’t arrived yet. Wanted to get a quick check before Father’s Day weekend - pool looks clear and doesn’t seem to have any issue except for some plaster chipping which I figured was due to low calcium hardness.
Went to pool store and they ran their tests and it showed 62. When I put this in the Pool Math app it’s saying to add 85 (!!!) lbs of Calcium Hardness increaser. I bought Balance Pak 300 but it comes in 7 lb bags. Do I really need to buy 10+ of these?? They aren’t cheap!

 

[mknauss]

Wait for a proper test kit. Pool stores rarely get CH test results even close to reality.

 

[proavia]

If your pool is vinyl lined, there is no need to be concerned with CH.
If you have a heater, the heater manufacturer may state a minimum CH level.

Either way - as Marty @mknauss stated - wait for a proper test kit.