my pond is almost done. liner will be here next week, and pond should have water in it 2 weeks from now. also pond is 5k. i dont realy know that much about koi. i do know i only want 3-4 fish,but large fish so i chose not to go with goldfish. most koi kinda look the same to my untrained eyes. so what should i do just go to petsmart and buy "koi" for 5 bucks, or the nice garden store for assorted japanese koi at $70 a piece.