I too disagree on the minimum 300 gallons, that is a bit much, I'd say for a full grown Common Pleco around 100-150g should be rather sufficient. Anyways, I totally agree the better decision would be trading in that common pleco for a bristlenose. Would you rather have a massive, fast growing, extremely messy 2 foot Common Pleco outgrowing your tank, or a lil' Bristlenose that will max out at 4-6 inches? Lol.
♥Amanda♥ ☮ ♪♫
~20 Gallon Community, ~5 Gallon Betta