the person i got him off of had him in with a 22 inch arow and some oscars. i guess he did ok there so im hoping he will do good with his current tankmates. man is he active. never stops swimming. also thanks for the commentYeah its a really great tank...I love the stock. You think the wolf will be okay with the others though? I've been toying with the idea of adding a mala too my 72"x30"x24" comm but wanted more feedback before I got it... I have a thread about it I posted recently.