The Tetra Pond Test 6 in 1 Water Test Kit is a simple to use dip test for an instant indication of the water quality of your pond. Good water quality is the key to healthy fish and a trouble-free fish keeping. Traditional methods of testing are not ideal for situations where time is limited, or when frequent testing is necessary, for example in new pond set ups. The Tetra Pond Test 6 in 1 Water Test Kit offers a perfect solution, by testing for 6 essential water quality parameters in less than 60 seconds. The strips test for pH, Nitrite (NO2), Nitrate (NO3), KH (Carbonate Hardness), GH (General Hardness) and Chlorine (CL2). Application:Simply dip the test strip into the pond 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. We recommend testing every 2-3 days in new ponds, and once a week in established ponds. This test kit is compatible with the Tetra Digital Water Test App available for most smart phones and tablets. Once you have tested the water, the app will suggest the appropriate product. Simply download the free app!