Calcium Hardness Vinyl Pool
If calcium hardness goes above 400 ppm you will likely see a white flaky crust on the liner and pool equipment.
Calcium hardness vinyl pool. For vinyl pools calcium should be between 150 250 ppm. Calcium hardness is also very important to the chemical balancing of your vinyl liner swimming pool. Fortunately calcium hardness changes rather slowly so a once a month testing and adjustment should be all you need. If you have a concrete or plaster pool keep the level between 200 ppm and 275 ppm.
The ideal reading for calcium hardness in pool water is about 200 to 400 parts per million. A low level can result in foaming which is unpleasant but shouldn t harm the liner. Calcium for a liner pool can be a bit lower than a plaster pool in the range of 150 250 ppm. Dip the test strip dip the calcium hardness test strip into the pool water.