Sorry! I don't check the Goldfish section that often. Your fishes might be happier in a bigger tank(like a 20 gallon). It might seem that itisn't overcrowded but you'll be surprised. They are big waste producers. Goldfish need more space than tropical fish. By the way, I'm 11 too! I thought I was the youngest member....
Well Stradius011 it seems we share a birthdate
Peter Stradius011 is correct is saying you Goldfish need more room. their actions will be more natural and their growth patterns will be more normal. The growth of Goldfish kept in small tanks tend to be stunted.
Now to answer your question- I really need to update my profile but the signature space in profile won't hold all the tanks
Right now I have set up and running 17 tanks, a 30 gallon grow out tub and a 25 gallon with fish from outside that come inside in the winter.
I understand sometimes it's hard to get extra/larger tanks and since you already have the fish you will need to do at least two 50% water changes each week. Goldfish are big waste producers and Ammonia and Nitrites will build up fast. fish also pass urine. so to keep your fish happy and healthy they need the water changes. Hope that helps.