Curing new plaster?

[chem geek]

The numbers look very much in balance as far as calcium carbonate saturation goes. So I doubt that there is precipitation of calcium carbonate occurring. If the plaster were curing, then you would find that the pH and TA would rise a lot (mostly the pH) and that eventually you would measure a rise in CH. That is what happens with curing. So if you let your pH get to, say 8.0 or higher, then you might see some calcium carbonate forming, but I don't think that is happening.

Basically, your water is in decent water balance now, but if the plaster is still curing you will find a strong tendency for pH to rise and you'll be adding lots of acid to keep the pH down to normal levels (around 7.5) and doing so will restore the TA to where it was.

Richard

[JJParrish]

Thanks Richard. Happy Swimming. Joyce