TETRATEST 6 IN 1 QUICKTEST Dip test for instantly checking water quality. Good water quality is the key to healthy fish and a trouble-free aquarium. Traditional methods of testing are not ideal for situations where time is limited, or when frequent testing is necessary (for example in newly established aquariums). The TetraTest 6 in 1 Quicktest offers a perfect solution, by testing for 6 essential water quality parameters in less than 60 seconds. Easy and quick to use - 6 readings in 60 seconds Tests for pH, Nitrite, Nitrate, KH (carbonate hardness), GH (general hardness) and CL2 Application 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. We recommend testing every 2-3 days in new aquariums, and once a week in established aquariums. 25 strips