Broodstock should be selected based on size, vigor, and general health. It is important to select large, healthy animals. Before introducing broodstock into the hatchery it may be a good practice to treat them with a salt or formalin dip to eliminate potential external pathogens. Specific studies on prophylactic treatments for red claw have not been conducted but recommended fish treatments (e.g., a prolonged bath of 1,000 to 2,000 ppm salt or 15 to 25 ppm formalin) have been used experimentally. These treatments did not seem to harm the red claw and have appeared to be effective at preventing introduction of para-sites. At present, there are no approved therapeutics for red claw.