Hello from MD

Hello everyone. I just wanted to introduce myself. I have a few tanks. Some in use, some sitting empty. my largest is 120 4X2X2 my smallest is a 10g. I didnt intend to breed but somehow my daughter talked me into a few selective breeding. the last was a breeding pair of bumblebees. I dont want to breed but I would like a nice mix for the 120. Problem is 4x2x2 I would love to get a pair of frontosa maybe 2 other fish non aggressive. Love any suggestions.