That's the point exactly. They do not thrive through it. Theyre bread to be fattened up and killed for food, not to live long healthy lives. Also, carp are generally much larger fish that need a higher fat content.
The point is, there are so many specifically formulated food options for your fish, that it does not make sense to feed them food made for something else. If you want to expand their menu, look into other pellets and flakes, as well as the many frozen and freeze dried options available.
I'm an exfish farmer.
In the UK their is almost no market for carp as a food fish.
Alsmost all fish farmed are either for the fish trade or for stocking into lakes.
The foods have been tested for well over 30 years for the best results.
Their mainly made from Fish meal, yes the same fish meal thats turned in to flake foods and pellets.
The main difference's are the protein, oil, fats contents with several other chemicals thrown in.
With trout/salmon pellets with astazanthin this is a colour enhancer and this chemical add the pink colour to the flesh of the fish.
Feeding this to fish will also enhance the colour of the fish.
The peotine in trout/salmon pellets would be to high in for most as this is usually 55% where most fish only want 40-45%.
I've feed many crushed pellet foods to tropical (maily livebearers) with no ill affect to any of my fish. but i also feed a lot of brine shrimp, something like 50/50.
Brine shrimp is a complete food to almost all freshwater fish, and the rest was just used as a filler for the adults
While you can it's not advised and i strongly urge to feed a varied mixed diet to all fish, but if you study your fish and soon see any problem from feeding one diet always try other's.
