With 37.6% of private dwellings unoccupied on Census night, a lot of Noosa Heads pools sit behind properties that are let, lent or lived in part of the year. Census night is a snapshot rather than a letting statistic, but 37.6% is the highest of the four suburbs in this pack — Tewantin sits at 7.3% — and the gap is large enough to describe two different jobs.
The practical consequence is that consumption is lumpy. Ordering to last month's usage under-supplies a busy month and over-supplies a quiet one, and the person doing the dosing is often a manager or caretaker covering more than one property, for whom running out mid-changeover is a bigger problem than the difference between container sizes.
It also changes which products earn their place. Salt and chlorine get used and are worth holding. Recovery products — clarifier, algaecide, a shock — matter because the failure mode here is a pool that turns while nobody is watching it, not a pool that drifts slowly. What you want on the shelf is what gets you back to clear before Friday.