Hello. My name is James and i have a 1500 gallon koi pond. The fish are in the pond, but it is not finished. I still have to fine tune the filtration system. I am a kid and i just finished 6th grade. I have a 5 gallon tank and i got my koi when they were less than 2 inches long and now they are all over 18 inches. I had the koi in the 55 gallon, but that way too small so we built the pond.