I have a minor outbreak of blue green algae in my heavily planted 55 gallon community tank. I physically removed a lot of it today. When I looked at the tank this evening I noticed that 2 of my 3 corys were apparently eating a lump that had fallen to the bottom of the tank. I watched them for at least 15 minutes and they are definitely eating either the BG algae or something in it. As far as I know they aren't meant to eat this stuff. Anyone seen this before or have any idea?