> "Sodium hypochlorite" is the "liquid chlorine" generally used in
> pools as "shock" treatment; it doesn't tend to be long-lasting.
> Sodium hydroxide is Lye; I'm not sure why you'd use it in either
> pool or hottub. It's probably not very good for the plastic surfaces
> of a spa...

Roy would be familiar with "Fair Go". They did a piece a year or
so ago looking at how so-called "proper" spa and shower cleaners
were rotting them because they were not actually suitable. The
inappropriate chlorine content attacked both fibreglass and plastic
as well some tile grouts

You've done the right thing by asking of course. Whenever you're
in the spa, it's a good idea to take a wiz

> (ah.  Looks like "janola" is normally a cleaning product of some
> kind?   The kiwi equivilent of "clorox laundry bleach", perhaps

Yes, it's laundry bleach. Domestos in the UK

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