I've been feeding my common pleco blanched zucchini every other day. He's under three inches, and I drop in zuchinni the size of him (basically 1/4 of a zuchinni). The zuchinni is usually gone within 48 hours, but my pleco doesn't have the stringy poop they're notorious for. Am I not feeding him enough? He lives with blood parrots who unsuccessfully try to eat his food. I'm not sure when common plecos become omnivorous, but he hasn't gone for the sinking cichlid pellets yet.