Why a pool looks tired by August — and what a weekly visit catches first

By the middle of August we're usually being called to pools that, on paper, were being looked after. The pattern is almost always the same: nothing failed suddenly. Several small things drifted for a few weeks and then met in the same afternoon.

August is the hardest month for a pool

Peak heat, peak bather load, wind-blown dust off the terraces, and — in a rental — a changeover every Saturday. Equipment that coasts through May gets no rest in August.

What a weekly visit is really checking

• Water level, because a pool that drops below the skimmer pulls air and the pump dislikes it.
• The filter and pump running pressures and hours — a number that moves is telling you something.
• Skimmers, baskets and drains, cleared before they become a blockage.
• Water clarity and balance, tested rather than eyeballed.
• The pump's sound and the plant room for leaks, which is where a cheap fix becomes an expensive one.
• Surrounds, grilles, ladders and fencing — the parts guests touch.

The signs owners spot too late

If you arrive once a month, you see a pool that either looks fine or looks broken, with very little in between. The useful information lives in that in-between space: slightly hazy water, a louder pump, a filter that needs backwashing more often than it did in June.

If you rent the property out

Pool condition is one of the few things a guest will photograph and put in a review. The pool is also the first thing that suffers when a changeover runs late. A service visit on the same day as the changeover, not the day before, is usually the difference between a review that mentions the pool and one that doesn't.

Pools rarely break. They complain for a while first, and someone has to be there to hear it.