"Pamela G." wrote in message
...

Hi, can anyone tell me how much caustic soda to put in my cesspool? And
when do I add it, on a monthly basis or just when it starts to fill up
and needs to be pumped?

Ask the municipal building permit office where you live.
You need to be sure you are talking about an (open)
cesspool as distinct from a (closed) septic tank.

--
Don Phillipson
Carlsbad Springs
(Ottawa, Canada)