Feature:1. Reliable: A reagent for professionally measuring the total hardness of fish tank water quality, suitable for sea water and freshwater.2. Timely Detection: The water quality is too hard and there are many debris, which will cause the death of fish, the use of reagent detection can avoid in time.3. Accurate: Aquarium water hardness tester provides fast and accurate measurement, timely detection and treatment to ensure the safety of your water quality.4. Test Kit: Including test agent, test powder and test bottle, complete water hardness test kit, more convenient to use and meet your needs.5. Easy To Use: No special operations and tools are required, which is convenient for you to test and use at any time, saving time and effort.How to Use:1. Wash the test cup three times with the water sample to be tested, and take 5ml of the water sample.2. Add 15 drops of reagent in No. 1 bottle and shake slightly.3.Add a little more powder of No. 2 reagent.4. Add No. 2 reagent drop by drop, and shake it evenly while adding, until the color of the water sample turns blue, and count the number of drops.5. The number of drops multiplied by 1 is the total hardness of the water sample. (German degree)Specification:Item Type: Aquarium Test ReagentMaterial: Test ReagentPurpose: Total Hardness Test of Fish Tank Water QualityPackage List:2 x Test Reagent1 x Test Powder1 x Test Bottle1 x Sampling Spoon