Everybody thinks that because they feed a variety of frozen foods that their fish are healthier and happier. They are also wrong. A staple pellet like NLS is superior to live or frozen foods without question. In nature fish starve and do without proper balance frequently, pellets are better than anything found in the wild.
I am not doing this for the enjoyment of the fish I am doing it specifically for their health. The wide variety of foods you speak of from the last 75 years well...have you read the ingredient list on NLS? It contains probably the largest variety of foods in a single pellet. Likely all the foods you mentioned in a dried-nutrient dense form.
All my research says frozen food is just junk food, treats, with poor nutritional value. It also points to pellets being the most nutritional, why do you think reef tank keepers feed frozen or flake rather than pellets? Because pellets are the most nutrient dense form of food which spoils their water. I need all the nitrates from food I can get, my tanks run down to 0-nitrate literally 5 days after dosing.
Breeding RCS for your Betta to hunt is a BAD idea unless they are in a separate tank, RCS in a Betta tank is a never ending buffet and they end up dying from overeating. I used to keep them together since I had so many RCS I did not know what to do with them, he never stopped hunting and soon died from it.+
Many of you are overlooking the fact this thread title is NANO FISH, as in...they can literally eat almost nothing but powder...think about this before you make live and frozen food suggestions.
NLS sure gets a lot of hype. I honestly can't see why it's better or worse than any other pellet fish food.
Ok, if you really think pellets alone are the pest possible fish food, please point me to some serious information on this. I'd like to learn. However don't point me to vendor or manufacturer sites, as these are not unbiased sources.
As for SW reef systems, I feed pellets to my reef fairly often. I'm not saying they are a junk food, just that they are not a perfect solution when used alone. SW reef keepers feed other foods for a number of reasons. Some fish just will not touch any dry food no matter how good it is for them. Others need diets best supplied by foods other than pellets. Pellets will not "spoil the water" or cause algae issues in a reef system unless you really overfeed them, but then any food will do that.
As for frozen foods, yes some are of limited value. Frozen brine shrimp comes to mind. Other are excellent. This depends a lot on the individual food.
As for needing nutrients from the fish food or fish droppings, I'd say you need to alter your fert dosing so you don't run out of nutrients so quickly.
On nano fish, just about anything as large or larger than a full grown neon can handle white worms. Just about anything past the fry stage can handle micro worm. Fresh seafood can be cut or ground to any size you like. Even my small tetras and rasboras can easily handle the small pellets. It's not going to hurt anything to grind it all down to fine dust, but it's not needed.