My pool was replastered a little over a year ago and ever since then, the calcium hardness has been steadily rising until now it is 1000. I've posted a few times on the forum but no one has been able to help me figure out why. It's gotten so high that I am now going to do a reverse osmosis on it. The company came out to test the water and this is what they think is cause of the high calcium.
" The TDS and Conductivity readings are very high. When those parameters are combined with the low alkalinity it becomes a problem. Your actual "adjusted" alkalinity when
the cyanuric acid is factored in is 41 ppm. That is about 40% of what is recommended by the National Plasters Council. That is aggressive water that will pull calcium from the plaster and will eventually damage your plaster. The high TDS and conductivity are acting as interference with the ability of the chlorine to oxidize and sanitize."
They measured the TDS at 5580 and the Conductivity at 7144. I have been keeping my TA at about 60 (recommended for the SWG) but for the last few weeks it has been at 50. I'm wondering if I have been keeping the TA too low all along (I've been aiming for the 60-80 range recommended here but am usually near the low end of that). Does this sound plausible to you? All other factors that people suggest for the high calcium are not valid. Thanks!