ok only have 4 of these little tiger barbs left about a half inch each.. everyones saying they need a bigger tank than a 20g.. so should i move these fish to my 55g tank? only thing is i have an oscar in there about 6in who could easily swallow the tiger barbs, and i cought him chasing a platy around the tank one day but couldnt catch him, i put the platy in a smaller tank. i also have a 10in tire track eel and 10in fire eel, who could deff fit them in there mouth, but have yet to show any signs of aggression towards any sized fish, and so far they will only eat bloodworms for me. should i maybe put the tier barbs in the 55g and put the oscar in the 20g? or is that way too small for a 6in oscar who grew at least 3in in 2 months?