chlorine dose

Winterizing a 2-Person Hard-Shell Hot Tub: Exact Sanitizer Doses

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Closing a 2-person hard-shell hot tub for winter takes more than just draining the water. You need a final sanitizer dose that’s high enough to kill everything in the shell and lines before the tub sits empty for months. This guide gives you the exact bromine and chlorine amounts for a typical 250- to 350-gallon 2-person hard-shell, plus the steps to apply them correctly.

Bromine and Chlorine Doses for Winterizing a 4-Person Hard-Shell Hot Tub

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Closing a 4-person hard-shell hot tub for winter takes more than draining the water. You need the right sanitizer dose at the right time to prevent biofilm, scale, and a nasty surprise when you refill in spring. This guide gives you exact bromine and chlorine amounts based on typical 4-person capacity.