My girls have won 6 gold fish @ a local fair. They gave us bags and I told the wife we need a tank. We now have five. Well long story short within a week I bought a used 30 tank set up. From what I read and my fish store also stated that the 30 gal tank would be more the sufficient. I read the first thread and now seeing you guys are saying min a 50 gal? Holy sheepers. I told the store I wanted to add two more small fish and an algae eater to the 30 with the gold fish. I have no idea what type they are but the store told me they will grow no more then 3 to 6 inches. I love the fish and so do the girls. I have done everything I can to insure a proper tank. I even added a heater since I had planned to add more fish...