They'll eat a very wide range of vegetables: zuccini, cucumbers, squash, pumpkin, sweet potatoes, lettuce, etc. I'm not sure what the problem is with your pleco, I have never had this happen with any of the plecos I've kept.Fishman1318;4127098; said:Thanks for the info. I have a pretty good algea growth in my tank as of now so they've been eatting that. The rubber lip is kinda aggresive though and stubborn to come out of his hidding spot. I have algea disks that I put in the tank. What kind of veggies should I put in the tank? and whats a good way from keeping them from floating around the tank?