Agree with 95 percent of your comments in the last post. I would answer these a little differently:I personally don't think a quarantined tank could be healthy because that type of tank needs to be "quarantined" from all pathogens forever. That means no fresh or live food.
Fish were designed to eat nothing but fresh or live food so right away we have to eliminate that.
Does it sound natural to anyone that the food the fish was living on since birth and the food the fish was designed to eat can no longer be fed?
Female fish are also always pregnant and it is impossible to find a female fish in the sea which is not pregnant. How many fish in quarantined tanks lay eggs? I don't know but I would like to.
1. I do not think most people with a QT's tank limit feeding to no fresh or live food. For example - I have seen many people who have quarantined their tanks feeding for example 'LRS'. I'm not sure (maybe you can explain) - how freezing live food (which I believe you do) - would be forbidden in a QT tank. I agree with you that some fresh/frozen food is beneficial to fish.
2. There are lots of pets who in the wild would live on raw meat, yet we feed them pet food. Though there is a movement out there to feed cats, dogs, etc a raw-type diet - there is not a lot of evidence that there are consistent health benefits.
3. For some time - I only fed flake food - and my fish had been QT'd (at the LFS) - they laid aggs all the time. I have a blue lined dotty back (a female - no male) that occasionally lays eggs. Once the food goes into the 'gut' - it seems to me (and of course I might be wrong) - that all of the 'stuff' is broken down into fat, protein and carbohydrates. One benefit of fresh/frozen foods is I believe the omega fatty acids is probably higher (at least depending on the quality of the dry food) than many dry foods. My opinion - no matter what you feed - a variety is important.