The Brick is Back - Razz strategy

[Praxising]

I'm still pretty confused on the convention for calling the 4th street brick. Just exactly what makes the pot big enough?

For instance: you and one opponent completed? Or if it's only completed do there have to be more opponents? Or does "raised pot" mean a raise of the completion?

My problem: it's like pulling teeth to get a lot of micro players to put money into the pot. If I complete - they call. If I limp hoping someone will complete so I can raise, they just limp.

So how much exactly do I have to get in there to make sure I see fifth?