Just thought I'd share my input on the 2 rams I had. I have a 29 gallon planted community with 9 rummynose tetras, an angel and various catfish. I used to have 2 gbr with them a male and female. Well they started breeding and needless to say they destroyed everyone lol. So I rebooked them to my lfs 140 gallon display. Now I know my tank is smaller but I wouldn't do 4 gbr they will own most of that tank if they start to spawn, I would just do 2. However, mine was probably a little crazier than most but still there's my input. They also like temps in the 80's. I kept mine at 84 and they thrived. If you do decide on them I'd add them last.