I've heard a lot about feeder fish and decided to probably feed one a week as a treat. Will likely get a 20 gallon for them. I'm not really sure what to feed these fish though. I've heard of feeder food that gets rid of internal parasites and infections. Really I'm looking for something that will get rid of internal parasites and diseases if possible, or at least discourange these. Is there anything like this out there? If not what else is good for feeder comets?