is essential for life, how we choose to feed our aquarium inhabitants
depends on their habits as much as ours! Fresh food is, so long as it
is clean, the best. Not the half decomposed artemia or mysis that has been
hanging around in your dealer's or your own fridge for a week or so.
Whatever you do, keep variation top of the list
Artemia, mysis, shrimps, mussels, oysters
Lettuce (wash thoroughly) spinach, banana is also recommended by many
sources. Organic quality would be better, at least to try to avoid any toxic pesticides
Should be the best, but much is not good about frozen food, suggesting the cold chain has been broken somewhere. A survey carried out in Germany detected pathogens (disease- causing bacteria) in a number of frozen foods, including well known brands. Another good reason always to defrost the foods in water and to throw that water away.
If kept cool and dry, should be vitamin and trace element rich. Some
fishes prefer granules, some flakes. Some fish will not eat these at
all, and it doesn't have to be the 'difficult' fish, whereas some renowned for their 'pickiness' will eat anything put into the aquarium.
Dried seaweeds seem to be useful for many herbivores.
Particularly for filter feeders.
Add vitamins to defrosted foods and maybe dried foods regularly. Some dried foods have added garlic to get rid of intestinal parasites.