I never heard of that way. I have always just added a little of flake food every few days. then I put in a peppermint shrimp get the bacteria growing better.
Raw shrimp is very common for starting a new tank. Put it in a nylon stocking for easy removal. But it is an older method Especially with all the available Bacteria in a Bottle that's available.
You can leave it in permanently as many do. Or take it out when nothing but the echo skeleton is left.
Like myself there are many who prefer to use clean, pest free dry rock. Cook for two weeks, SeaChem Stability for two weeks. Cycles done!! No pests and no unwanted algae