hey guys i need your help my 55g tank has a gar, rtc and a foot long arowana iknow the tank is small but i have to grow them out a little before i put them in the pond since the fish in the pond are much larger okay what type of filtration is good for the tank i only have a internal filter and a sponge filter. will a canister filter be sufficiant share you opinions the rtc and the gar are quite small 8 inches

