How to Harvest Yeast for a Homebrew Batch

Most slur rates just kind of done manually get you about a billion cells per mil. It's really hard to collect it much more concentrated than that unless you have some ways like we're doing and the film really helps us. How much harvested yeast is needed for a five gallon, you know, 19 liter homebrew batch? Not much, I guess, right?" "We're trying to shoot for seven and a half million cells per mil"