:banghead3: ok i have a pond it is very small -around 500 gallons and it is in a round shape. No filteration only fountain.we want to make the pond bigger and expand it, add a filter,( etc...) but we do not know what to do with the 13 mixed koi and goldfish we have in there. we are afraid of having them die if we take them out and put them inside in like a tubberware tank. Also winter is coming so we are in a dilemma and we dont know if we take them inside for winter is it nessicary for them to hibernate over winter or can they be taken inside and put in a tuberware tank and kept warm and feed them. So should we wait for winter to pass and them build in spring and take them out or is it ok to take them inside for winter and build the pond and put them in in the spring. the faster to get the pond expanded the better - we would like to do it in the winter but we dont want the fish to die. Also if we can take the inside, what supplies do i need to maake a cheap indoor pond with an ok filter system and an estimate cost of all supplies. I would very much appreciate a full answer answering all my questions cause i really care for these fish and we want to make a better home for them. PS: i have one , one foot big koi fish and like 12 other small goldfish :fish2::fish2: