Calcium hardness is also very important to the chemical balancing of your vinyl liner swimming pool.
Calcium hardness vinyl pool.
If your pool has a vinyl or fiberglass liner the calcium hardness level should be between 175 parts per million ppm and 225 ppm.
A low level can result in foaming which is unpleasant but shouldn t harm the liner.
But what it depends on isn t that difficult.
Dip the test strip dip the calcium hardness test strip into the pool water.
Fortunately calcium hardness changes rather slowly so a once a month testing and adjustment should be all you need.
If calcium hardness goes above 400 ppm you will likely see a white flaky crust on the liner and pool equipment.
The ideal reading for calcium hardness in pool water is about 200 to 400 parts per million.
Calcium for a liner pool can be a bit lower than a plaster pool in the range of 150 250 ppm.