Tetra Pond 6 In 1 Quick Water Test Kit Tests pH, N02, NO3, KH, GH, CL2. Dated 8-2024 so half Price but should work past this date, guide date only. 25 Test Strips Ideally Suitable for Pond Water Testing. Pond inhabitants such as fish react very sensitively to excessive changes in the pH value, which impacts their well-being. The general hardness affects the vital functions of fish, while the carbonate hardness has a direct influence on the stability of the pH value (pH buffer). Nitrite is extremely harmful, even in very low concentrations, and should not be detectable in the water.Tetra Pond 6 in 1 test strips enable you to quickly and reliably determine the six most important water values in ponds in just 60 seconds. The pH, general and carbonate hardness (GH + KH), nitrite (NO2-), nitrate (NO3-) and chlorine (Cl2) in the garden pond water are measured, and the colour chart can be used to determine whether these are within the safe range. TIP: To support in the interpretation of your testing results, try the free Tetra Aquatics app available for smartphones. Tetra Pond Quick Test 6 in 1 kit is a handy dip test for instantly checking water quality. Good quality water is essentials in any pond environment to ensure the health and longevity of the pond fish. By using the Tetra Pond Quick test kit you can easily and quickly monitor these levels and take appropriate action. The test kit will measure the levels of pH, Nitrite, Nitrate, Carbon hardness and chlorine. The test kit gets to work as soon as you dip it in the pond water and produces a result in 60 seconds. Specifications Simply dip the test strip in the water for a few seconds, and then wait a minute for it to change colour. Then just compare the colours to the chart on the pack to get your readings. Always read the instructions before use.