suck on a discus? So I went to the LFS yesterday and was looking around. And it happened to be feeding time while I was there. The discus didn't eat all the food so the pleco ate the ones that fell. But while the discus was picking at the food at the bottom, the Pleco swam up and started sucking a discus. That discus swam away and 10 seconds later, the pleco started chasing another discus and started sucking on that one. The discus escaped though. Any ideas? One discus did have some black spots on its sides. Don't know what that could have been.