The recommended range is 150 400 ppm parts per million with an often cited stricter range of 200 400 ppm.
Calcium hardness in vinyl pool.
It also produces itchy skin.
If calcium hardness goes above 400 ppm you will likely see a white flaky crust on the liner and pool equipment.
Calcium on the low and high end of the scales will eventually cause problems and when they do be ready for some serious problems.
A hardness of 10 is fine in a plastic pool.
For vinyl pools calcium should be between 150 250 ppm.
Low calcium levels in the pool.
Low hardness does not.
Fortunately calcium hardness changes rather slowly so a once a month testing and adjustment should be all you need.
Calcium hardness is also very important to the chemical balancing of your vinyl liner swimming pool.
Truth be known vinyl liner and fiberglass pools are likely to decline faster in a low calcium environment.
Keeping your calcium hardness in the midpoint.
In addition to ph and total alkalinity calcium hardness must be kept in balance so that your pool water does not become too corrosive or end up scaling the surface of your pool.
These are symptoms of swimming pool water that is unbalanced.
In general the whole saturation index thing the pool industry has wasted so much paper on doesn t apply to most pools.
If your pool has a vinyl or fiberglass liner the calcium hardness level should be between 175 parts per million ppm and 225 ppm.
Low ph will damage copper pool heaters.
High calcium is rarely a problem if other lsi factors are adjusted properly 500ppm calcium hardness is easily managed without scale formation.
Hardness at any level is only an issue in a plastic pool pvc pipes vinyl liner polymer pump if it s high.
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.
Calcium for a liner pool can be a bit lower than a plaster pool in the range of 150 250 ppm.
If you have a concrete or plaster pool keep the level between 200 ppm and 275 ppm.