I have a 30,000 pool. I am using the BBB method which is working great. Only problem is I am adding about $2.30 worth of Clorox nightly (and that's from Costco!) I figure that at around $70 per month, if a SWG will last 3 years on a cell then I'm thinking I will save money over my current expenses. We just bought this house in April so I don't yet have a full year of pool expenses to base this off of; just the last three weeks of BBB.
Am I thinking right?