Not too much, had a big die off a few months back, lost both my stud Orino and Peru Mono. Just got this new Ocel, the big Orino, 20"+ silver Aro, the Oscar, and a big Red Devil. Got some more Peru Monos growing out with some silver dollars and a flagtail, all of which will go in this tank. Gonna be awhile on those, they are still only about 4".