I do not plan to keep them in this tank. Like I mentioned... this is a growout tank and all of the fish in here started at 1.5 inches or smaller. They have grown very fast and I do have 2 other tanks. One a 75G and a 125G. I do plan on getting a 200+ gallon. The aggression issue just started with the umbee maturing so that is why I am on this forum to ask for advice. I am wondering if the umbee will continue to get more aggressive or my trimac will hold his own if they are placed in a larger tank. If need be I will of course separate them and put them in different tanks. There is no physical damage as of yet, but am aware this could happen. Just seeking opinions from experts if it is possible to keep these fish together in a community setting in a 200+ gallon tank. Thanks for all the replies!
I would just separate the Umbee and Trimac pair especially if the umbee is already harrassing the trimacs. If you're getting a 200 gallon tank, I'd place the umbee in there, put the trimacs in the 125gl and move stuff into the 75. Maybe you could make the 75 gl a community tank with smaller cichlid, or use fish that are pre-existing.Just a thought.