Starting up my 20L :)

[AfricanCichlidOwner]

Yeah. Not only will the Pleco outgrow the tank and get stunted in the process, but they have a massive bioload. In other words, they poop a lot and put out lots of ammonia. It would really up the amount of maintenance the tank would need on a weekly basis to keep your nitrates in check once the tank cycles. The good news is, without it your tank will be able to support more fish than it would with it in there. Keep an eye out for the smaller varieties if you really want a Pleco, though. They are fun fish to watch, but with smaller tanks you really need the smaller kinds.

Alright thanks. I'll be looking for one.