8 days ago I raised CH from 150 to 300 using calcium chloride (peladow) in my 20K gal SWG plaster pool.
7 days ago I performed an acid wash with 10 lbs of citric acid. The manganese stains were removed over night and the next day I added 2 qts of HTH Metal Control sequestrant which is 20%-30% HEDP per the MSDS. I then added another qt of Metal Control the next day to make it 3 qts total. I also added a ½ gallon of HTH algae guard non-foaming formula (10% quaternary ammonium chloride) and another ½ gal the next day.
The pump has been running 24/7 and recirculating back to the pool through a sand filter that I backwashed 3 days ago.
I have slowly brought the pool back to following readings using borax, bleach, cyanuric acid and salt (also added 8 oz polyquat). I was adding bleach very slowly and the FC has been 0 all week until today.
All testing was performed using Taylor test kits except the borate tests which were made with Lamotte strips.
About 2 days ago I noticed that the water was starting to get a little cloudy. I stopped the pump a few hours ago to see if the water would clear up but it’s still slightly cloudy.
My questions are:
1. Is it possible that there are suspended solids (ex. calcium?) caused by adding too much sequestrant? CH has remained constant all week.
2. Can you have too much sequestrant? Is there a sequestrant test?
3. Do I need to continuously add “maintenance” sequestrant even if I don’t add any water? Aren’t the metals supposed to be removed in the filter with the aid of the sequestrant?
4. I’m ready to add boric acid to bring the borates up to 50 ppm, but I’m concerned now about the slight cloudiness. I was hoping for that “sparkling clear” look. Should I proceed with the boric acid?
5. Should I try backwashing again?