I'd like to start a discussion on CO2 injection. It seems it is often quickly shot down whenever it is brought up here for a number of different reasons but the discussion never goes very far. I think I'm in a slightly different situation where it would normally be ridiculous for me to even consider it other than that I think I would have most of what I need to set it up sitting around the garage and I typically use less than 2 gallons of acid a year and would rather not have it sitting around.
First question, how is CO2 typically introduced in to the pool? Low pressure? Is a venture needed? How about carbonating at high pressure then adding the carbonated water to the pool?