I am new hope it's ok to add a question to this post as it seems to be closest to a problem I am facing now. I have a powder like algae floating on the surface of my water. It will spread out to cover the entire water surface and it clings to anything it touches that leaves the water. If I try to mix it in to water column I can not as soon as I stop water agitation within seconds to maybe 3 minutes its resurfaces. What I do know is it is not any "normal" type of algae type that turns water green as if it was the Daphnia would consume it faster then it can reproduce. Is there any way to rid myself of this problem cannot involve chemical pesticides as they are starting food for my Ambystoma mexicanum and when they are just starting out they are hyper sensitive to everything.