- Jun 14, 2011
- 1
2 month old pool. 15k gallons. VS pump. SWG. Oversized sand filter. testing and brushing twice a week.
I have noticed round black spots at the water level on the grout at the back of my skimmers. It brushes away easily but always comes back. No other spots anywhere. Sure looks like algae to me. Should I be concerned? How do I eliminate it once and for all?
FC never lower than 3. Would prefer 5-6. Getting used to SWG. just added borax today.
Any thoughts?
Thanks
Les
I have noticed round black spots at the water level on the grout at the back of my skimmers. It brushes away easily but always comes back. No other spots anywhere. Sure looks like algae to me. Should I be concerned? How do I eliminate it once and for all?
FC never lower than 3. Would prefer 5-6. Getting used to SWG. just added borax today.
Any thoughts?
Thanks
Les