LP Sterox Test Strips come in a pack of 50 strips and are designed to give a quick and clear indication of adequate dosing of LP Sterox in a system. Once the system is dosed with LP Sterox, the furthest tap from the tank or dose point should be run out to allow the LP Sterox to move through the system prior to testing. Dip a test strip into a sample of system water for two seconds, wait 10 seconds and then compare to the colour chart on the side of the container. At the recommended dosage rate, 1 litre contains 100 ppm in-use hydrogen peroxide (0.30% LP Sterox in solution) – this is the required dosage rate for legionella control. Should the test strip show the required concentration of LP Sterox is not adequate, dose the system with the required amount of LP Sterox required to achieve the 100ppm in-use concentration of hydrogen peroxide and retest following the above procedure. For further information on treating legionella, consult BS EN 8580, ACoP L8, HSG274 and HSG282.