Her everyone, This summer i started a 150 gallon outdoor pond with over 12 fish, both koi's and goldfish. I was given a 75 gallon tank this fall so i decided to put my pond fish into it for the remainder of the winter. I realize there are more fish than i'd like in the 75 g. but what can ya do. I didn't want to let my fish stay outside this winter out of fear of losing them. Now that my fish are in the new tank, i need to know what to do with the outdoor pond for the winter. Thanks everyone.