I have a 55 gallon im going to setup this weekend. I have 4, 3in. long fedder fish and 1 pleco im going to put in it. Then a friend gives me a 12in. goldfish out of the blue today (that or kill it :< ). If i put all of these fish in the tank, will that be to many? Im not going to keep the big one, just till i can find him a good pond. Will this be way to many fish for my 55 gall. tank? Im almost certain the answer is yes. Thank you.