If you have a vinyl or fiberglass pool you won t be able to use a pumice stone.
Will calcium hardness cause stains on vinyl pool.
A calcium scaling specific additive may remove the deposits but these products can take months to dissolve calcium silicate.
When you retest the pool water the alkalinity should be lower.
Chemical experts say this isn t the case.
Then refill the pool adjusting the alkalinity.
If you have a concrete or plaster pool keep the level between 200 ppm and 275 ppm.
Then get the ph and total alkalinity in line.
Low calcium levels in the pool.
Calcium hardness is also very important to the chemical balancing of your vinyl liner swimming pool.
How to lower hardness in a pool.
Calcium on the low and high end of the scales will eventually cause problems and when they do be ready for some serious problems.
Calcium for a liner pool can be a bit lower than a plaster pool in the range of 150 250 ppm.
The optimal calcium level is 200 400 ppm.
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.
Calcium hardness must be actively managed along with ph and total alkalinity to keep water in proper chemical balance.
These stains are notoriously difficult to scrub free.
An edited version of this article originally appeared in the summer 2007 issue of the edge a publication of the northeast spa pool association.
For this you ll need to partially drain your pool.
Some pros fear that purple stains are permanent on a more porous surface.
If you re dealing with too much calcium in a pool you can try adding a sequestering agent which is a chemical treatment that fights the effects of high metal and calcium content in swimming pool water as an added bonus it also fights stains.
A higher ppm causes deposits on the surface and cloudy water.
The stains should dissipate over time even in a plaster 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.
It would scratch the pool.
However the longer the stain sits untreated the more difficult it can be to remove.
Calcium can appear in the form of a thin calcium film that covers dirt or metal stains on the pool interior.
