Hi all-
New pool owner that recently did a pool drain and refill thanks to high CYA levels from previous owner. Fill water has crazy high CH and TA levels. My research here on TFP indicated that if I just lowered the TA level and kept pH lower the CSI would be tolerable and keep scale from forming. So I jumped in and started lowering TA with the muriatic acid and aeration method. The strange thing is, my CH levels have been dropping as well! I thought that there was no way to lower CH, other than draining water and refilling.
A few facts. So far I have put in 19 gallons of muriatic acid. TA has dropped from 650 to 220. CH has dropped from 1200 to 675. For the first month of this drop we were not swimming in the pool and the temperature was low, so there was no water added to the pool, and in that time the CH dropped to about 800. In the past few weeks I have started topping off the pool with softened water, so I can see that lowering the CH a bit. Can high amounts of acid drop the CH in the pool? Any other ideas on why the CH has lowered?
New pool owner that recently did a pool drain and refill thanks to high CYA levels from previous owner. Fill water has crazy high CH and TA levels. My research here on TFP indicated that if I just lowered the TA level and kept pH lower the CSI would be tolerable and keep scale from forming. So I jumped in and started lowering TA with the muriatic acid and aeration method. The strange thing is, my CH levels have been dropping as well! I thought that there was no way to lower CH, other than draining water and refilling.
A few facts. So far I have put in 19 gallons of muriatic acid. TA has dropped from 650 to 220. CH has dropped from 1200 to 675. For the first month of this drop we were not swimming in the pool and the temperature was low, so there was no water added to the pool, and in that time the CH dropped to about 800. In the past few weeks I have started topping off the pool with softened water, so I can see that lowering the CH a bit. Can high amounts of acid drop the CH in the pool? Any other ideas on why the CH has lowered?