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.
Calcium hardness has a bad reputation and that reputation is undeserved.
A low level can result in foaming which is unpleasant but shouldn t harm the liner.
One can assume in the course of a week the ph in a plaster pool will rise and in vinyl or fiberglass pools the ph will drop in most cases.
The ideal reading for calcium hardness in pool water is about 200 to 400 parts per million.
It also produces itchy skin.
If you have a concrete or plaster pool keep the level between 200 ppm and 275 ppm.
Fortunately calcium hardness changes rather slowly so a once a month testing and adjustment should be all you need.
These are symptoms of swimming pool water that is unbalanced.
The recommended range is 150 400 ppm parts per million with an often cited stricter range of 200 400 ppm.
Calcium for a liner pool can be a bit lower than a plaster pool in the range of 150 250 ppm.
Calcium on the low and high end of the scales will eventually cause problems and when they do be ready for some serious problems.
If your pool has a vinyl or fiberglass liner the calcium hardness level should be between 175 parts per million ppm and 225 ppm.
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.
If you keep your calcium hardness in the midpoint between those two limits about 275ppm then you should be fine.
Calcium hardness is also very important to the chemical balancing of your vinyl liner swimming pool.
The ideal range for calcium hardness in swimming pools is 150 400 ppm parts per million.
Low calcium levels in the pool.
For vinyl pools calcium should be between 150 250 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.
Low calcium as is often the case will cause long term serious damage especially to plaster vinyl liners grout in between tiles metal rails and even concrete decking around the.