Hello fist time posting so hope it goes well I pick up 3 Buttikoferi that are about 1.5 inches and iv put them in a 20g long and was going to put them in a 135g later on when they get bigger is the 135 to big for them for me to put them at the size that are now are they going to be able to get food in a large tank like that and say screw the 20g long??? Sorry to bother some help would be great ???