He said I'd never be able to maintain a clear pool not using the Trichlor tabs (which he also said didn't have stabilizer, btw). We're going on 6 weeks now and the water looks better and more sparkly than it did with the tabs and the "super duper" ozone/UV thingamajig for which he tried to talk me into replacing the $$$ bulb but I wouldn't do it. Even my hubby was skeptical and said, "But, dear, he does this for a living."