We've used Zoe when we were working through the Ich too. I'm pretty sure we bought ours from AD. It's just basically a vitamin for your fish to keep their resistance up. We don't soak the food for an hour though, just a few minutes and often with a drop or two of garlic (with the hopes that it helps keep them interested in eating). Now we bust out the Zoe anytime a fish seems unusally stressed (such as if we are introducing a new fish that is getting the special hazing welcome from our powder blue).