So I am about to purchase a Florida gar and I have been reading that young gars always need food at hand. I really don't want to feed guppies or anything from the store because of diseases and I was wondering if I could feed him shiners, smelts, crayfish etc native to the North East region? Do these carry diseases often? Do I quarantine them if I trap them from a lake? because they are in freezing cold temps and in my tank its 76 F I don't know if that will effect my gar... Please provide Info!!