i moved awhile back and broke down my 125 and moved the fish to a 55...and only used like half the gravel....i still have it... what im wondering is if i take the water from the 55 and the gravel and filters if it would be strong enough to support the fish and grow from their.....the fish is a 4-5 inch gt hes just plain not happy in the 55.....and i wanna add outher cichlids