[Doodles]

I just have a few questions about my Killifish. I bought him a long time ago and put him in my tropical tank (75 gallon). Im not positive but I think he is a Euro Asian Killifish, he's yellow.

Anyway, he was pretty nasty so Im just wondering are they aggressive or is it just my bad luck? I read that they are peaceful. He is now in a 10 gallon alone and Im just wondering if I should try to put him in with my balas? Then I will have another 10 gallon that is free.

I don't want to give him up because I kind of like the little sucker. So if he has to stay in the 10 gallon by himself that alright, just wondering about other peoples experiences with these fish.