How to keep a Koi fish?

The climate of my city is too extreme so I don't want to risk putting my fish outside. The other day I had a dream that my fish were in a bathtub. My bathtub is about 5 feet by 4 feet and 2 feet deep. Is this big enough? Would there be any other problems...

I have one huge 30 x 40 Japanese water garden pond with tons of Japanese Koi fish. But the last three months my backyard has been stalked by a Blue Heron who has killed at least 10 fish if not more. What can I do to keep this huge bird away from my precious...

I am thinking of keeping ducks as we have a pretty large pond. At the moment it has about 50 carp/koi fish in it. Will the ducks and fish get along? Or do I have to decide on one or the other? Thanks

I plan on decorating my office and was wondering if I could keep koi fish in a fish bowl?

I have a baby koi and I want to keep a catfish with him and is their any species of catfish than he would get along together? Or could I get another koi my babykoi is about 3.5 inches long. (3 and a half inches) so plz help !! Thank you!

I don't want my fish to live as royalty, and I am not a fish fanatic. I just want a cool looking fish that can get big and survives. If i have only one koi fish can it survive in a 10 or 20 gallon tank? And please, would everyone kindly refrain from...

I keep dreaming of a bucket over filled with giant koi fish all orange one. Meanwhile I'm waiting for a phone call for a loved one. There was barely ne water in the bucket so I freak out and put the fish in a bigger tank that I once had a Lil fish in...