Swimming pool & spa chemicals are available from our Bibra Lake pool shop in Perth. We do free computer water analysis with our spin spectrometer & Palintest 25 photometer. The correct water balance ensures that your pool water is safe to swim in. If your swimming pool or spa water is not correctly balanced you could adversely affect the health and comfort of bathers, as well as attract nasties like algae and bacteria. Balanced water also prevents scale build up, corrosion and equipment damage. During the swimming season, you should be testing your pool water at home with a test kit about twice a week. These at home tests should be able to test for free available chlorine, pH, acid demand and total alkalinity. Back up these at home tests by bringing a water sample into our store for a free pool water evaluation every two weeks.