This is crop of Asterina's harvested yesterday siphoned off glass during water change. This is result after removing about same amount about 10 days ago.
Other then multiplying like crazy and being a bit unsightly when there is allot of them (to me anyway) they do not appear harmful at all.
Actually are quite good about clearing up slime algae on glass (and likely elsewhere in tank)
I don't really have any other nuisance algae in tank, so don't have any idea what else they may chow down on.
Anyone wanting some of these...make an offer...any offer.
