WOOD FIRED HOT TUBS

An honest comparison of the four hot tub shell materials, including the tradeoffs we would want stated if we were the ones buying, and where an aluminum tub is not the right choice.

How sacrificial anodes protect an aluminum hot tub, why magnesium rather than zinc, how often to replace them, where to source them, and the four things anodes cannot fix.

The four numbers that matter in an aluminum hot tub, why calcium hardness is the one most owners miss, what order to balance in, and which common spa products are not compatible.

Aluminum doesn't rust the way steel does, but it is a metal and it reacts under specific conditions. What those conditions are, why soft water is the one most owners don't expect, and how the tub is built to handle them.

Three different things get called pitting, and they have different causes. What the deposits actually are, why soft water is the one most owners don't expect, and how a tub already showing them gets put right.