Peat set up

[ryantube]

So I want to use peat to lower my pH. I use RO water but pH would just bounced back after a couple days.
Substrates are inert sand and Fluval Shrimp stratum.
My questions are:
1) Do you boil the peat before putting in the tank?
2) What is the lowering capacity of peat? In order words, how much pH unit can it lower within a day?
3) Do you know any set up that's convenient and effective in buffering pH using peat?

Thank you very much!