I am two days into the new season and find myself already at a cross roads. First I must preface by saying I don't have a full set of readings to post at the moment mainly because I have added borax and bleach this morning.
I have a number of reasons to suggest draining the pool completely and starting over vs. investing more money trying to make this work. I have a 9000 gallon fiberglass pool that I fill with well water. (free water) This is my 4th season of owning the pool and up until last season, it has been very simple to maintain crystal clear water. Since last year, I have had a hard time keeping the water clear and also keeping pH up.
Ever since I got my TF100 kit a couple years ago I have been completely unable to get my CYA to acceptable levels no matter what i try. It has never read below 100 even with 80% drains of the pool. I have done that twice and immediately after the refill my CYA was still over 120.
So even though I would like to drain and start over, I have past experience which tells me I won't have any success. I would like to do a 100% drain but I am afraid of doing that to a fiberglass pool as there are so many warnings out there against this.
I have even tried draining while filling hoping I could "flush" the remaining CYA out of the water while down to the last 20%. But my cya never changes substantially. So right now I am thinking....should I go ahead and try the drain approach again and risk seeing no results as the previous two times or maybe I should just discontinue dichlor and trichlor and hope the refill water will eventually take over and eliminate the cya contaminated water?
Currently my water issues are that the water is still somewhat cloudy 50+ hrs after opening. I can barely see the bottom. Also my pH continues to read low (6.8) and my TA continues to read high (220) and of course the high cya. FC was 22 and CC was 0 last night and I added 2 btls of bleach this AM because according to the Pool calculator I need to reach a shock level of 39.
I will post full results later.