Freeze-dried foods are accepted by some puffers, and not by others. It seems to vary, so if you want to try them out, feel free to do so, but there's no guarantees.
However, understand two things about freeze-dried foods. Firstly, they should never be used as a staple. One of the common threads uniting many fish with bloating and constipation is the use of freeze-dried foods. Presumably because freeze-dried foods lack moisture, if used to excess they swell up inside the fish, blocking the digestive tract. At most, use them once or twice a week.
Secondly, freeze-dried foods are massively overpriced for what you get. Wet frozen foods are invariably much cheaper, while also being safer, more nutritious, and more readily accepted by a wider range of fish.
I have no idea at all why people bother with freeze-dried foods. They have no real advantages and many disadvantages. Used once a week as a "treat" they might be worthwhile for standard tropical fish normally given flake, but that doesn't make much sense for puffers.
The only understandable reason for people buying them seems to be that they don't need to be kept in a freezer, perhaps because some people don't like putting fish food alongside human food. If that's the reason -- get over it! Frozen foods produced for fish are at least as safe as human foods, and can be easily stored inside a plastic food container if you're really squeamish.
Cheers, Neale
