Generally, if you have a leak and it's not visible in the equipment area or anywhere along your waste line (common issue: worn down gasket inside the filter's multiport valve) then you'll need to contact a leak detection specialist. You can either find one online, or visit https://www.spasa.com.au/ to view a list of reputable leak detection companies in your area.

However, if the leak isn't severe it may just be evaporation (cm/week):

Fortunately there is a way to confirm (bucket test):

• Switch equipment off: Turn pump and chlorinator off so the surface is perfectly still.

• Set the bucket: Fill a straight-sided bucket ¾ with pool water and stand it on the second step, rim above the pool’s surface.

• Mark both levels: Tape or pencil a line at the water inside the bucket and another at the pool water outside.

• Run for 24h: Resume your normal pump schedule; keep swimmers, blankets, and rain out of the equation.

• Measure the drop: After 24h, measure from each mark to the water. If the pool is ≥ 3 mm lower than the bucket, suspect a leak.

• Optional pump-off repeat: Redo the test with the pump off for 24h to see if the loss only occurs under pressure.