Sounds like your doing the rite thing. Just feed very lightly today and keep your fingers crossed. The food we make is the best thing for him but until the ich is gone feeding should be kept to a minimum. Sorry I took so long to get back, we've just been so busy here. Always call the store for any questions that need a quick answer. If the tang dies we will help you with some store credit for your troubles, but this is a common experience with all powder tangs. Thanks, Ray