Tetra Test Strip 6 in 1 The Tetra Test Strips are a quick way to test 6 water parameters in 60 seconds giving you the advantage to catch any problems before they get our of hand. The kit contains 25 test and test for the following water parameters, PH, KH, GH Nitrite, Nitrate and Chlorine Also have you tried the new Tetra APP to check your water test with? :- DIGITAL WATER TEST (please watch the video) Water tests made easy! The Tetra Aquatics App determines your water parameters in seconds – with great simplicity, speed and precision. Lethargic fish, sad-looking aquatic plants and algae everywhere? Some of your water parameters may not be right. And now it is easy to find out which parameters you need to adjust – with the new Tetra Aquatics App. The Tetra Digital Water Test simply, quickly and precisely determines which of the key parameters can be optimised and stores the results of previous readings. This gives you a precise overview of the parameters at all times – making fishkeeping more fun and exciting than ever. Simply go to www.Tetra.net to download your free app !