I have a 36 gallon tank with a red finned shark and a bunch of catfish, mostly cory cats. My mother got a electric blue cichlid, she thought it was really pretty. I don't have a lot of cichlid experience but I didn't think it was a good fit in this tank. The cichlid seems to be nipping at the cory cats after a couple days a pretty lot and I'm pretty sure I should bring him back to the store. What do you guys think?