After having my pool done for 3 months I'm having trouble with alge. My chlorine & acid levels are fine . Called a buddy , he checked the phosphate level & it was way high . I treated it following the directions . It cleared up & 3 days later its high again.
My water temp is around 84 & I had the water tested at a pool supply incase I was doing it wrong .What is causing this & how do I stop it ?