Not sure of exactly when but I would say ASAP so there growth will not be stunted. Being in a 18 inch tank they may have already.Just rescued 3 3inch balas from an 18 inch tank. Are in my 75 gallon at present
How long before i need to get them a bigger tank?
thanks in advance
Oh yeah I bet they went from 18 inches to 48 its prob like a mansion to them.They are much more active now so the move has done them some good