Good day. Been using TFP for 3 years with great results and appreciate all the help that got me started. I am getting yellowish areas on the walls and floor of my pool. When brushed they disappear in a cloud of what look like dust.
I have done the overnight test 4 different days and the chlorine level has never been down more than 1 ppm. Time to slam or are there other possibilities?
I have done the overnight test 4 different days and the chlorine level has never been down more than 1 ppm. Time to slam or are there other possibilities?
