yeah dont buy plecos because you want them to clean your tanks, they dont do it well enough to justify having one for that reason. they also need a diet of vegetable matter, zuchinni, algae wafers, pumpkin, green leafy veggies.
This statement is too broad, and not true. Plecos... or more precisely Loricariids, are a wide variety of catfish that have diets ranging from wood eaters to sponge eaters, and even meat eaters. There is only one true pleco, being Hypostomus plecostomus, which is rarely seen in the hobby anymore.