Recent content by louisd1205

Shut off the pump and through some chlorine granules directly on black or dark areas. If they go away, then it is organic and can be treated better with chlorine and Stainless steel brushing to the areas.

I have these exact black stains on my inground pool steps and elsewhere. It is black algae. I treat it by poring chlorine granules on the black areas and watching them go away. After that, I use a stainless steel wire brush to break them up. They will NOT go away just by shocking the pool.

Thank you for your suggestions. I can lower the pH some by adding pH down but this will decrease the pool's TA to a point where it is unstable. I've been successful in lowering it in the past to a pH of 7.2 but at the expense of a very reduced TA. The parameters I gave in this post are the...

I have a 16 year old 25K gallon in ground gunite pool with DE filter and 1.5 HP pump. The water is mostly clear but the walls tend to get green or black algae on them. I don't have the time and patience to keep brushing the walls so I keep the pool at a FC level of at least 8 ppm most of the...

Can anyone tell me what the acronym SWG stands for? I'm not really new to this stuff but have never seen it before. Thanks