I recently saw some tiny cichlids at Petsmart (About .5"-1" long) They're not specifically labeled unfortunately, but I can tell between a few uniquely colored common types. I have a 10 gallon aquarium and was wondering if I could temporarily keep them happy. They will only be in it for two-five months. The SMALLEST aquarium they will ever be kept in after that is a 40 gallon. The tank is already cycled and aged for some time. Are cichlids aggressive when they are that small or will I have to be careful? I've had a decent amount of experience in the hobby and have lots of supplies on hand including 2 five gallon backup aquariums.