Rules are meant to guide, and when you break them you will be penalized. Almost every line of business is guided by dos and don’ts. In catfish farming business, there are many rules you must never attempt to break. They must be obeyed or else profitability of the business may be affected negatively. For instance, at the stage of breeding, male and female catfish of the same family and same generation must not be used to breed. The effect of violating this rule is long term and can even make mess of the whole process. However, not every catfish farmer will hatch what he will stock but every catfish farmer must stock small fishes to produce table size. This is the main reason I want to focus on seven rules you must observe as you stock your fingerlings.