Shake the reagent bottle thoroughly before use! Ensure that the water you are testing does not come into contact with aquarium or pond water!
1. Rinse the measurement vial several times with the water sample, then fill it to the 5 ml line. Wipe the vial dry on the outside. 2. Add the reagent drop by drop. Gently shake the vial after each drop until the color transitions from red to brown and finally to green. 3. The total number of drops used from the reagent indicates the total hardness (in °dGH). For instance, 5 drops = 5°dGH. 4. Cleaning: Rinse the vial thoroughly with tap water before and after each test. Seal the reagent bottle immediately after use. Store at room temperature and away from light. Keep out of reach of children. For testing ornamental fish aquariums and pond water only.

US Usage Information Most ornamental fish are native to regions where the soil is low in minerals. Conversely, many other parts of the world have the opposite condition. Rainwater leaches calcium and magnesium from the soil, resulting in hard water. With the sera gH-Test, you can swiftly assess the total hardness level. Understanding natural conditions aids in selecting the appropriate fish species for a community aquarium, which is essential for successful breeding. To reduce high total hardness, mix in R/O water. A combination of sera aquatan and sera blackwater aquatan, or filtration through sera super peat, will yield softer water suitable for most South American fish (e.g., those from the Amazon basin).