New to the forum here. I have a 15x36' gunite saltwater pool. Runs on a Pentair Whisperflow pump with 4 cartridge filters. I'm struggling with regaining my clear blue water.
A couple weeks ago it began to turn green. Not cloudy but a clear green. Water temp is 52 so I found that surprising. My Pentair intellichlor was no longer producing chlorine, and the reading from the Taylor test kit was clear without a hint of pink, .5-1 range.
A week prior to that, I had some brown stains that I treated with Ascorbic acid (with the chlorine nearly at 0), followed by 32 oz. of Metal-Free. The standard AA treatment. Did help but not fully eliminate the stains.
Here is what I have done in the past week: 5 days ago added another 32 oz. of Metal Free at the advice of local Leslie's employee, ran pump for 24 straight hours, then thoroughly cleaned filters (pressure now at 10, was at 20 when dirty). Then put chlorine tab in skimmer to slowly raise the levels.
After waiting 4 days for the water to clear up, yesterday I became inpatient when seeing chlorine still at .5-1 and still green (but no algae stains) and put 4 lbs of granulated chlorine directly into the pool. Result? Now obviously a 5-10 chlorine reading, but water is now GREENER than before.
What should I do next? Any help is greatly appreciated! Total alkalinity is 90 (raised last week from 60), calcium hardness 290 and pH is 7.2, and I have not let it get above 8 or below 7 this entire time.