I've been reading about acidophilus being fed to goldfish, will this have benefits for arowanas, or other large fish? how often, and how much would be a good amount to feed our fish? I've also read Hikari pellets and other pellets containing acidophilus, but my arowanas does not take pellets, but i have a bottle of acidophilus for my own, was thinking if it would be a good idea to share with my fish? 