I feed zucchini, cucumber and de shelled peas. I buy a couple zucchini and cucumber at a time, slice them into 1/4 inch slices and freeze them in a ziplock bag, then when I feed the veggies I just take a slice or two out of the freezer and put them in a plastic cup with a little tank water and microwave them for about a minute or as long as it takes to defrost and cook them a little. I use a solo cup that I keep in my aquarium stand for tank use only. Then I let them cool down completely and drop them in the tank. Some people weigh them down or put them on a veggie clip, but my plecos seem to enjoy chasing them around the tank until they sink. When I feed peas, I use frozen peas and I microwave them in the same way, then take the shells off when they have cooled down and I crush them into bite size pieces.