I think they've killed this sponge. Then, the sponge may be dying on it's own, as they're pretty hard to keep. But I just noticed these tonight. They're very small, translucent or white bugs crawling around on it. I've been looking over the tank very closely over the last few days, several times a day, and they weren't there before.
Does anyone know what they are, and how worried I should be?
