Hi! So, I've done a TON of research (a ton meaning that I have been researching practically day and night for the past month), on my new tanks stocking ideas. I think I have come to my conclusion, but would like to get some opinions. I love south american cichlids, especially severums, and I was wondering if it would be a good idea to put them with rainbowfish (Melanotaenia and Glossolepis genus). I know rainbowfish can stand a wide range of water parameters, so hopefully that will not pose a problem. I would like to get a school of rainbowfish (10 or less), and a severum or two. My tank is a 75 gallon. Any opinions?