I've had a pool since 1976 and have never encountered the problem I'm having now. I have always maintained my pool myself as far as testing and dosing of chemicals and normally have crystal clear water. I've had an algae problem that I can't seem to get rid of. I've tried several algaecides with no effect. Here are my test results FAC 5, TAC 5, CH 400, CYA 100, TA 110, pH 7.4, TDS 900, Water temp 76. I normally use a floater with 3" Trichlor tabs, and shock as needed with 68% Calcium Hypochlorite. I know the cyanuric is way too high and I've done some partial water changes to try and bring it down.
Any suggestions would be appreciated.