Aquarium Systems Strip Test A new range of test kits from Aquarium Systems that accurately test your pond/aquarium water. Simply dip the test in the water and then read the results! Tests for: - Nitrate - Nitrite - pH - Total Hardness - Carbonate Hardness - Chlorine Contains: - 50 Tests strips - Water Resistant tube for storing with colorimetric scale Directions: 1. Immerse the strip in the water for 5 seconds. 2. Shake it the strip to remove excess water 3. Compare the results for the chlorine test immediately on the colorimetric scale 4. Wait 60 seconds before comparing the other tests with the scale.