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One other question. Many of these have features I can add or chose between, such as, salt water tub, ozone, oxygen enriched, etc. Some of the things I have heard, but not sure on the facts or opinion, are;Saltwater tubs are great for your skin, but bad for the hot tub in general. Diminishes life expectancy?Ozone requires less chlorine for filtration, but is very dangerous? (this one did interest me, but curious on the danger)Trillium jets last longer.
Ozone makes a fine SUPPLEMENT to a proper sanitation regimen. Get proper sanitation figure out first.