Was wondering,i have a 93 g cube...30x30x24h...i have a chocolate cichlid..3" a yellow lab2.5" a green terror 3" an electric blue ahli 3.5" a silver dollar 4",chunky bp 4.5" a small tropheus dubiosi 1.5" a black calvus .5" a gold head comprissep 1" and an orange comprissep 1" a banded leopardus fascitus 4.5" a jewel cichlid 5" high fin pleco 4" a peacock eel 6"( always under the substrate lol) and 2" geophagus....all look happy in the many caves of lace rock and holy rock and some other rocks that help the ph levels....my question is...im getting another green terror who is 5-6"....will this be drama to a peaceful tank...as of now...the big boss is the electric blue ahli keeps everybody in check...can be aggresive...even chasing my lil green terror away whenever he wanders to the front of the tank lol...give me some advice fellow aquarists!