The Pleco Feeder - Large The Smart & Fun Way to Feed Plecos. Better Nutrition Makes Healthy Fish Made from 316 Stainless Steel and food grade silicone rubber. It will provide a lifetime of carefree service. It makes feeding your plecos and other aquarium fish a varied healthy diet quick and easy. Just screw a piece of fresh shrimp, zucchini or any vegetable and place it in your tank. Your fish will have better colors, breed easier and thrive by feeding them fresh food.