5-Way Test Strips – The ultimate and quick and easy way to test your spa water for all your parameters, these test strips will check for free chlorine, total chlorine or bromine, pH, total alkalinity and calcium hardness. Simply dip a test strip into your spa water and remove immediately, wait 15 seconds and compare colour of pads with the standards printed on the bottle. Maintain free chlorine or bromine between 3-6mg/l, pH between 7.4-7.6, total alkalinity between 125-150mg/l, and calcium hardness between 100-200mg/l for ideal water balance and safe and comfortable spa water.