Hello, been using the tfp method (liquid chlorine,muriatic acid from home depot) for about a year and all has gone well. I recently been noticing some spots as seen in pics (Line seen in pics is a internet cable above pool). Any idea what these can be? How can i remove? I moved into this house about two years ago and previous owner used leslies pool supply for water testing and also used leslies powder plus for shocking. I have a pentair fns plus 48 filter and right now I am topping pool off about once every week in this summer(los angeles -south bay). I add muriatic acid as suggested in tfp calculator because my ph rises to about 8. I will post water parameters below using a taylor k2006 kit. I use a dolphin s200 for vacuuming about once a week. Please let me know any details i am missing, or any equipment you guys recommend? Thanks in advance
20k gallon pool
FC-6
ph-7.6
ta-85
ch-550
cya-50
20k gallon pool
FC-6
ph-7.6
ta-85
ch-550
cya-50