I know this topic has been beaten to death, but I thought I'd try to pick some brains in a fresh thread.
My pool, which is usually not prone to algae bloom, and chemically balanced pretty darn well according to my own tests and that of two separate local pool stores, has been getting frequent surface algae. Its beginnings seem to coincide with my landscapers spreading some nice fertilizer into my pool a few weeks ago.
My Phosphate level is at 2500 according to at least two tests, and repeated scrubbing, backwashing, and shocking has not worked; the green patched return in a day or two.
I have reservations about using things such as "Green to Clean" and "Phos-Free" and frankly, don't need to empty my wallet right now as we are on a tight budget.
I have a 26,000 gallon vinyl-lined pool, live on Long Island, and the pool gets all-sun, all day.
I am sure you folks may have other questions for me, so ask away and thanks.