don't kill it?..lol...I wanna get one soon..I have the tank and filter and everything..and my girlfriend was gonna give me a baby koi out of her pond until it was too big to keep in the tank..but I haven't found a good place to put the tank yet

clean the bowl whenever the water gets dirty..make sure you clean it out good and try to keep the water you put the fish in a constant temp (same as what was in the bowl before..what you put it in while cleaning and the water you put back in the bowl)..other than that not too much to worry about unless it gets sick..but you can always get another fish