Pool Opening near you

A reopening is a sequence, not a shopping list, and most of the bad outcomes come from doing the right things in the wrong order. Water that has been still for months is stratified, full of organic load and usually short of everything, so each step depends on the one before it having worked.

Cyanuric acid, sold as stabiliser or conditioner, is the chemical that makes outdoor chlorination viable in this climate. NSW Health explains that UV light degrades hypochlorous acid to hydrochloric acid, and that about 35 per cent of the free chlorine can be destroyed every hour of exposure to UV light in outdoor pools. Added to the water, cyanuric acid bonds loosely to hypochlorous acid to minimise that degradation.

It is not a free win. NSW Health states that in stabilised outdoor pools the minimum concentration of free chlorine must be increased from 1 mg/L to 3 mg/L, that the concentration of cyanurate must not exceed 50 mg/L, and that the optimal concentration of cyanuric acid is 30 mg/L. In other words, stabiliser buys you slower chlorine loss in exchange for needing more chlorine present to do the same disinfection.

The trap at reopening is that cyanurate does not go away. NSW Health notes it is not consumed or lost from pool water except through splashing or backwashing, so a pool topped up all summer with stabilised chlorine products can arrive at spring well over the limit, and the only practical fix is dilution. That is worth knowing before you buy another bucket of the same product.

Australia does not have one pool season, it has several, and the right reopening date is set by your water temperature rather than by the calendar. In tropical and subtropical areas the pool is used year round and the equipment never really stops, so there is no reopening as such, only a pre-summer service before the peak swimming months of December to February.

In the temperate south the pattern is closer to a genuine layup. The water cools from about April, the pool is used little through winter, and the household starts thinking about it again when the days lengthen in September. Booking the service four to six weeks before you actually want to swim is the single most useful thing you can do, because a pool that needs days of filtration and a fortnight of chemistry to settle cannot be fixed the morning of a party, and because every pool technician in the state is busy the week the weather turns.

Alpine and tablelands addresses are the exception that needs local advice. Frost is not a design case for most Australian pool equipment, and the exposed pipework, the pump and any heater are the parts that suffer, so ask a technician who works in your area what they do with the plant over winter rather than assuming coastal practice applies.

The pump, the chlorinator and any heater have sat idle in a damp cupboard through the coldest months, and the first day back at full load is when their faults surface. Before the family is in the water, the plant deserves the same attention as the chemistry: look for weeping pump seals, perished o-rings, cracked unions, and lids that no longer seal on the skimmer or the pump pot, because a pump drawing air will never prime properly and will destroy its own seal trying.

Anything electrical around a pool belongs to a licensed electrician, and that includes the residual current protection on the pump circuit, the bonding around the shell and any lead or outlet that has been exposed to the weather. Test the residual current device the way its manufacturer says, and if it does not trip, stop using the circuit and have it looked at rather than resetting it and hoping.

Finally, walk the pool as a stranger would. Check that the suction outlet covers are present, intact and firmly fixed, that the ladder and handrails are tight in their sockets, that the surrounds are not slippery with a winter's algae, and that gates still swing shut and latch from every position without being pushed.

Getting a pool clear is the hard part; keeping it clear is a rhythm. Once the water is balanced and the residual is established, the job becomes a short weekly routine of testing, emptying baskets, brushing the waterline and watching the pressure across the filter, with a longer service every few months.

Two habits matter more than the rest in this climate. The first is running the filtration during the hours the pool is actually used and the sun is strongest, rather than only overnight, because that is when both the bather load and the UV demand are highest. The second is testing at the same time of day each week, so you are comparing like with like and can see a trend before it becomes a green pool.

Keep a simple written log of the readings and what you added. It takes a minute, it turns a vague complaint into a diagnosis when you do call a technician, and it is the only way to notice that your stabiliser has been creeping up all summer.