my sister keeps rosy red minnows in with her two comet goldfish and they are all happy and healthy. she has three minnows in with two comets and they have been together for about a year now with no deaths or anything. so is there anything that can be kept with smaller breeds of goldfish other than rosy red minnows? any information would be much appreciated, even if the answer is no lol thanks for the time and have a great day.