10 days ago my 35000 gallon IG pool was re plastered using Pebblefina sapphire galaxy. The pool wash acid washed before filling. The pool looked very streaky after it was filled and after reading other posts and speaking with my plasterer, we decided to acidify the pool. He put in 3 pumps and added 15 gallons of muriatic acid. The color looks good now. The Ph was off the scale low and TA was 0. I added 50 lbs of bicarbonate at his recommendation over about 5 days while monitoring ph and ta and brushing often. pH is now 7.0 and TA is between 60-70. Ca hardness is 550 now. I haven't had to add anything over the past 2 days but the pool water became quite cloudy. It is clearing now as the TA came down from 100 to 70. Is the plaster going into solution as TA goes down?
I reactivated my pump and DE filter(Hayward DE-600). The clean filter has a pressure of about 18 PSI and about every 2 hrs when pressure increased to 30 I would backwash. I was worried about running the pump hard overnight and did not load it with DE and noticed that the pressure went up over about 3 hours. I backwashed and it came down again. It makes me wonder what the point of using DE is when the pool water is basically clean except for calcium precipitates. I have been backwashing but not using DE for the last 36 hours and the pool is clearing finally. Am I hurting the system? I figure the worst that happens is the filter membranes scale and can acid wash them once things have settled down but would love an expert opinion.
Any recommendations about where I should keep TA levels?