I have a question regarding goldfish behavior. Back in May I put about
a dozon goldfish in my pond (small pond, about 15'x8'x2' deep) I took
them out and put them in a 30 gallon tank in my house for the winter,
they seem to love the aerator (Swimming up and down in the bubbles the
they freak out and fly around the tank (flipping out of the water etc)

My question is...

Is this normal?

J