Reptilesfishbirdsmammals;4502901; said:Well first all Black Ghost Knife fish are just maintainable in a 90G but a Red Tailed Catfish gets up to at least 36 inches (3 feet)..that sums up most of your decision..but i love both and id rather have imo a RTC..but a BGK is more managable..
ive personally seen 5ft and im willing to bet there is larger ones also.
