But what it depends on isn t that difficult.
Calcium hardness vinyl pool.
A low level can result in foaming which is unpleasant but shouldn t harm the liner.
For vinyl pools calcium should be between 150 250 ppm.
If you have a concrete or plaster pool keep the level between 200 ppm and 275 ppm.
If a vinyl liner s calcium level is too low this soft water situation could lead to foaming and other water problems and can harm the vinyl.
If your pool has a vinyl or fiberglass liner the calcium hardness level should be between 175 parts per million ppm and 225 ppm.
Calcium hardness is also very important to the chemical balancing of your vinyl liner swimming pool.
Dip the test strip dip the calcium hardness test strip into the pool water.
Calcium for a liner pool can be a bit lower than a plaster pool in the range of 150 250 ppm.