Use calcium hypochlorite as a disinfectant, you'll chlorinate the pool
*and* the calcium hardness will increase over time. As the calcium
hardness increases over time, you'll want to drop the total alkalinty
to maintain proper water balance.
Try getting at least 65% calcium hypochlorite, I've seen lower
concentration products around, 49%, and this is not worth getting.
On Apr 21, 9:24 am, " firstname.lastname@example.org"
Calcium hardness IS one of the chemicals you balance.
If the hardness is too low, the water will tend to extract
minerals from the pool materials. That is worse for
concrete pools than for those with liners. If the calcium
is too high, then it will tend to deposit itself of the
pool materials. And it all comes into play with the
other chemicals in the pool. So, you could tolerate a
somewhat lower calcium hardness if some of the other
components, eg PH are slightly off in the right direction.
There is a target zone for concrete and vinyl pools.
There is something called the Langelier Saturation Index
where all the components of pool chemistry come together.
There is a circular slide tool where you can put in the PH,
calcium, water temp, total alkalinity, etc and it gives the
value. The goal is a value of zero.
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