Friend of mine has a betta in a 10gal with 2 plecos and she put's wafers in the tank at night and removes in the morning. Well this morning she woke up to the wafer stuck to the side of a ceramic tree, covered in a gel and bubbles. The one she fed the night before was either dissolved (I wouldn't think, mine are messy when not eaten) or the plecos ate it.
Any idea what happened to this wafer? Did the plecos do this? I have a pleco myself and she doesn't care for wafers, but she's never done this. Would the betta do it?
Picture.. kinda hard to see.