I'm looking for help here. Our church has a 180K gal. IG pool which needed about $4K in chemicals this year. I converted my pool to SWG this year and love it! My money is no longer spent on chemicals and the water quality is outstanding. I talked about it so much that the church asked me to explore the feasibility of that size conversion. I called Polaris(they had no info on commercial applications), and Goldline. Goldline said we would need 8 SWG units,the warranty would only be 1 year, and cell lifespan would be only 12-18 months(with replacement cells listing @$605 each). Can any of you offer knowledge about this type of situation? Thank you