Okay, will someone tell me how to make this food.
Veterinarians from RUDN University have developed a way to increase the resistance of carp, the most common fish in fish farms, to the harmful effects of ammonia, which is found in almost all water bodies. The researchers found that the amino acid arginine added to fish food can be helpful. The results are published in the journal Aquaculture.
Method to protect carp from the harmful effects of ammonia (phys.org)