AquaChek Peroxide 3-in-1 Test Strips Tests for: Peroxide, Total Alkalinity, pH Peroxide is an alternative oxidizer which is ideal for shocking a biguanide based pool or a chlorine pool when elevated chlorine levels are not desirable as a shocking treatment. FIND AN AquaChek RETAILER Product Demos FAQ Product Information Recommended Products Product Information Peroxide: 0-90 ppm pH: 6.2-8.4 Total Alkalinity: 0-240 ppm Blister card. Peroxide, pH and Total Alkalinity. Recommended Products AquaChekSelect Kit AquaChekYellow