I am considering having a SWG put in my pool, however I don't really want to deal with adding acid that often if possible. So at the same time that I put in a SWG we are considering adding something called an ORGANIC PH unit http://www.poolsmith.com. It uses CO2 to keep the PH where it needs to be. My pool is about 18000 gallons so I would require 2 35lbs CO2 tanks, and they would have to be refilled about once every 3 months. Of course I'm not sure of the cost yet on refills, but I may also be able to just have a 50lbs tank put in and then have a service contract done to refill it on site for me.
So my questions are as follows:
1. Has anyone ever heard of this option?
2. Does anyone know if this works well? Even if there is added costs, if it works, I would rather have this "safer" method.
3. Aside from cost what would be the drawbacks of this? (Chemistry issues)