4 yr old pool, constantly has high ph and high calcium hardness issues. I recently drained the pool and did an acid wash all by myself... somewhere around May. Came out pretty good. Restarted the pool got all the numbers right everything fine for the first month or so. Calcium hardness upon startup was around 150ppm. I waited a while before testing the hardness because I thought that issue was gone but recent results show over 400ppm. How can this be? Only chems added where a little bit of shock to get started, some salt, some cya and some acid to control the PH. Nothing for Alk it was in range around 80 I have not put one other chemical in this pool since except acid. Not to mention the PH is always still high. Currently draining some and adding some fresh water. Going with borates this go around. All results from Taylor Test kit and bounced off of pinch a penny results every once in a while. Aquapure SWG.
Lasts results from pinch:
FC/TC 4ppm
PH 7.9
Alk 100
Hardness 400
Cya 60
Salt 3300
Lasts results from pinch:
FC/TC 4ppm
PH 7.9
Alk 100
Hardness 400
Cya 60
Salt 3300
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