7-In 1 Aquarium Test Strips, 100 Strips Aquarium Testing Kit For Freshwater Saltwater, Pond Test Strips For Fish Tank

7 in 1 test strips designed for aquarium test 7 crucial parameters at a time: – Total hardness (GH) – Nitrate (NO3) – Nitrite (NO2) – Chlorine (Cl2) – Total Alkalinity – Carbonate (KH) – pH Instructions: 1. Dip an aquarium test strip into water for 2 sec 2. Remove the strip and hold horizontally for 60 sec 3. Compare to color char on the bottle