I am ready to close my pool and wanted to adust my chemistry before the closing. I pumped out enough water to drain my lines and have 47,000 gal left in the pool. My TA has been high all year and I want to get it down now to about 100-120. Current readings are: FC 7.5, CC.5, Ph 7.2, TA 140 down from high of 270, CH 370, CYA 50, Temp 52.
I have been using muriatic acid to lower the TA, which brings my Ph down. I tried aeration by hooking up my 3hp compressor to a piece of pvc with lot of little holes drlled in it and droped the pipe into the deep end and ran it for 1 1/2weeks. The Ph was very slow to react.
I want to add some borax to raise the ph, then use the acid to lower the TA. Since adding acid and borax rises the borate level, how do I avoid inadvertantly raising the borates too much? I ordered the boate test strips in July but they never came, so I called and they are resending them now.
Will use of acid and borax to adjust Ph and TA alwys result in raising borate level, or only if you add them both at the same time? How long should you wait after adding borax before adding acid to avoid borate increases?