Would a Teacup stingray work in a 5ft 120G tank 60x18x24? It will have minimal decor through out for hiding spots and 6 cichlids. A GT, JD, Green Texas, Rose queen, Juvie male festae, and juvie brasiliensis with very low aggression. I know the festae will probably go nuts as he grows but right now hes good. I have another tank just in case it happens. Anyway, would it be ok to do? Also does it matter what substrate is used? gravel or sand?