i have a 3x2x18 and a 4x2x2
what fish will better suit the 4x2x2? the firemouths or the green terros......theres only 6 green terrors at 10cm and 8 firmouths at 9cm
A pair of either would work. I would decide whether I prefer GTs or FMs (GT's!!!), remove the other species, and then try and form a pair from what you have left in the tank, then add dithers etc. Alternatively you could try 1 FM 1 GT (pick your faves), rehome the rest and then maybe add a couple of other cichlids, dithers forming a community.