I also want to hurt those who think that if they keep the pleco in a tiny tank it wont get any bigger. THAT IS THE SAME AS KEEPING A CHILD IN A CLOSET OR A LARGE BREED PUPPY IN THE CUBBARD UNDER THE BATHROOM SINK. Common plecos grow to 2 ft and should be allowed to do so. There are smaller species of plecostomus that are better suited to smaller tanks, they usually cost a little more but are well worth it. Bushynose plecos, and bulldog plecos only get 5 inches, while the clown pleco only gets about 3-4 inches.
http://www.petlibrary.com/fw_trop_plecostomus.htm
Soon Plecos will be outlawed, here is a picture of a 4 lb pleco caught down in florida where they aren't native evil

I have a 8 inch common pleco that some guy was gonna release here in upstate new york because it was no longer doing his "job". scream