Tetra Test 7 in 1 strips provide comprehensive water quality analysis in seconds. Each strip measures six critical parameters: pH, carbonate hardness (kH), general hardness (gH), nitrite, nitrate, and chlorine. Ideal for freshwater aquariums and ponds, these strips help you maintain optimal conditions and detect potential issues before they affect your aquatic life. Simply dip, compare to the colour chart, and get instant results. Essential for any serious aquarist.