There are some "Blue-Green" algae that look brown. You'd do best to just treat it like a Blue-Green (Cyanobacteria) although it is likely (in my experience) a mixture of diatoms, Blue-Greens, and other algae. You should use a fine-mesh net to run through the water after cleaning - you can pick up a lot of the algae that way before it reattaches. Eventually it will diminish if you keep harvesting it and taking away the food source - which is likely a film of fish waste and food that is building up on the plant leaves and other surfaces. Steev --- Susan Welenofsky <welenofsky@comcast.net> wrote: > I've got this and it seems to collect on the leaves of my plants, but can be > knocked off easily. Some of it settles on the bottom. I've got a bunch of > it, and I'm not sure if it's algae or something else. If I had a better > filter, I could probably get rid of most of it. I am trying Excel. Any > thoughts anyone? > > > > Susan W > > _______________________________________________ > GSAS-Member mailing list > GSAS-Member@thekrib.com > http://lists.thekrib.com/mailman/listinfo/gsas-member > _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member