I recently bought a orange oranda goldfish. He's in a 40 gallon tub right now and I have the means to overwinter him. However, I know goldfish are social but I'm not sure if I could sufficiently house more than one goldfish over the winter. The tub is above ground (it's a stock tub), so I'm pretty certain that it would freeze over the winter. I am in an apartment building and have no outlets on the patio (which is really dumb).