my plans are to get 2- 3 more because at the moment they would have to stay on a 30 gal and when i feel they are big enough i am gonna put them in my which has an Oscar,a jack,a sinodontus,and a pleco which is a lot right there but i have had them at least 2 years now and they seem fine just gotta clean them more often right? all though i do also have a 55 gal to with an Oscar and jack and pleco in hmmm dammit i gotta rethink this now lol.