Calcium hardness is also very important to the chemical balancing of your vinyl liner swimming pool.
Calcium hardness vinyl pool.
Dip the test strip dip the calcium hardness test strip into the pool water.
If you have a concrete or plaster pool keep the level between 200 ppm and 275 ppm.
If calcium hardness goes above 400 ppm you will likely see a white flaky crust on the liner and pool equipment.
But what it depends on isn t that difficult.
Calcium for a liner pool can be a bit lower than a plaster pool in the range of 150 250 ppm.
For vinyl pools calcium should be between 150 250 ppm.
Fortunately calcium hardness changes rather slowly so a once a month testing and adjustment should be all you need.
If your pool has a vinyl or fiberglass liner the calcium hardness level should be between 175 parts per million ppm and 225 ppm.