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Thanks, all, for the great replies. ZzTop (great nick! I've seen the band live a few times), I notice you didn't mention Dimension One. That's one of the dealers I was planning to visit since they're the closest to my home and have been in business here for a long time. Have you heard of problems with their products? If I've understood your reply correctly, provided I get a reputable dealer for one of the best manufacturers, would all the hot tubs have about equal ease and frequency of routine maintenance? I'd figured a CD ozinator might reduce the need of chemicals. I've heard there are two kinds of CD ozinators, a chip-type and a cell-type, with the latter requiring less maintenance. Is that true? Do all the top tier manufacturers have this option, and the option of the cover lifter with gas shocks?