>Another question: he brews pu-erh in a large glass kettle, removing the
>leaves every three days but adding them more often, and boiling the
>concotion before each serving. Is this normal? Is it safe?

Some people do that, but leaving tea wet for that long, unless you
spread it out to dry (and why would you do that), encourages the growth
of bacteria and fungus. It's not unsafe, but why would you want to do
it?