There seems to be some confusion about fish nutrition. Proteins and fats are easy and store well as do minerals. But the enzymes, some of which we call "vitamins" are incredibly sensitive and degrade on contact very quickly with air, light and heat.

This is why every aquarium book ever written points out dried food is a temporary last resort and why breeding instructions usually mention condition with live food. This not an opionion it is a verify fact as anhybody knows who has looked at the literature.

If you examine the scientific literature concerning salmon you'll see it's an vexing ongoing problem to fins food made from dried fish meal or soy that's as good as life fish. The proeblem is the salmon do not produce the correct fest in the right amounts when fed anything but live food.

The that dried food is ok full time is an commercial opionion not a scientific fact, one contradicted by every aquarium book ever written.

Please understand heat destroys these sensitive molecules, freezing does not.

I've attached some references in hopes people can learn the difference.

The Impact of Food Processing on the Nutritional Quality of Vitamins and Minerals https://link.springer.com/chapter/10.1007/978-1-4615-4853-9_7


"The first of a two‐part review of the recent and classical literature reveals that loss of nutrients in fresh products during storage and cooking may be more substantial than commonly perceived"
"Frozen products lose fewer nutrients"
https://onlinelibrary.wiley.com/doi/abs/10.1002/jsfa.2825

" Vitamin C: mostly destroyed during blanching and drying of vegetables"
Selected Quality Attributes of Dried Foods
https://www.tandfonline.com/doi/abs/10.1081/DRT-200054180

VITAMIN C IN FISH NUTRITION. A REVIEW
https://fdir.brage.unit.no/fdir-xmlui/bitstream/handle/11250/131530/se_vol04_01_1991_p3-32.pdf?sequence=3

Introduction to Fish Nutrition.
Page 14 talks about how eaisly vitamins are destroyed and why comercial fish feed had added vitamins to compensate. Hobby prperations do not and could not be used in aquaculture due to their inferior nature.
http://kenanaonline.com/files/0062/62615/0851995195ch1.pdf

"Menadione is unstable during feed processing and storage and the dietary content may reach critically low levels." Vitamin K in fish nutrition
https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1365-2095.2011.00904.x

Nutrition and health of aquaculture fish
(talks about nutrition and disease resistance)
https://onlinelibrary.wiley.com/doi/abs/10.1111/j.1365-2761.2011.01333.x

Fish Nutrition (Third Edition) 2003, Pages 61-141
2 - The Vitamins
"Typical avitaminosis symptoms of Chastek-type paralysis, cataracts, convulsions, scoliosis, anemia, slime patch disease, clubbed gills, poor growth anorexia, and increasing mortality were reported"
https://www.sciencedirect.com/science/article/pii/B9780123196521500033

NUTRITION AND HEALTH OF FISH
"The potential impact of certain vitamins (A, E and C), trace elements (iron and selenium), protein, carbohydrate and lipid on the immune response and the pathogenesis of deficiency diseases is briefly reviewed."
http://nutricionacuicola.uanl.mx/index.php/acu/article/view/261