I had what I thought was mustard algae in my pool. There were brown streaks all over the bottom of the pool. It was easy to brush off. Kind of like a powder. My steps had a yellow powder all over them. For 24 hours I shocked at a mustard shock level. Before shocking at mustard shock I shocked at a regular shock level. Last night the chlorine held and I have kept my chlorine at 7 today. The pool looked great except for a very slight cloudiness. We turned the pump on high and within an hour there are brown streaks all over the pool. We keep our pump on 24/7 on low but will turn it on high a couple of hours daily. I've read on the forum about channeling and wonder if this could be the case.
Todays readings are: Chlorine 7, ph 7.5, cc 0, CYA 30. When I shocked at mustard shock I kept the chlorine at 19. Regular shock 13.
Yesterday I scrubbed the entire pool down with a brush. We backwash about once a week. We have a stocking on the skimmer basket. I check my levels daily and keep the chlorine at 4.
Do you have any suggestions? It was such a disappointment to go out there and see all that dirt in the pool after working so hard to clean it.
This forum is awesome. It's been a great tool. I plan on becoming a supporting member this month.