I have goldfish and 1 koi, the koi is about 4 inches long and I feed him regular pond pellets which is great, because the goldfish can eat them too, it just takes them longer because they're big (but they're the smallest size I can find). But I have a problem, the koi will eat all the pellets and the goldfish won't get any! By the time the goldfish have the pellets to a reasonable size to eat, the koi will come down and eat it. What to do? ! Are there any smaller sizes I can get on Amazon? What brand? I also feed them cucumbers for some fiber. And brine shrimp. So they're not starving but I would like everyone to eat equally.