The Fritz Liquid Water Test for General Hardness is a valuable tool for aquarium enthusiasts. This user-friendly test kit enables precise measurement and monitoring of the general hardness (GH) levels in your aquatic habitat. General hardness is a vital water parameter as it quantifies the concentration of essential minerals, primarily calcium and magnesium, dissolved in the water. These minerals play a critical role in maintaining the health and well-being of aquatic organisms, particularly freshwater fish and plants. By regularly testing and adjusting GH levels, aquarists can ensure that their aquatic systems provide the necessary mineral content for optimal growth and overall health. The Fritz Liquid Water Test for General Hardness offers a straightforward and accurate method to assess GH levels, allowing aquarists to make informed decisions about water quality management. With clear instructions and reliable reagents, this test kit helps users maintain stable GH levels, promoting the well-being and vitality of their aquatic inhabitants. Whether you're a novice or an experienced aquarist, the Fritz Liquid Water Test for General Hardness is an essential tool for achieving and maintaining ideal water conditions in your aquarium or pond. Directions & Dosage To remove childproof safety cap, push down while turning. Fill a clean test tube with 5 ml of water to be tested (to the line on the tube). Holding GH Reagent Solution dropper bottle upside down in a completely vertical position add one drop at a time. Ensure you count the drops as they are added. Cap the test tube and gently shake several times to mix solution after each drop or two. The test is complete when the water in the test tube, after having been gently shaken, turns from orange to green. If you have difficulty discerning the color after the first drop of test solution is added, remove the cap from the test tube and while holding it over a white background, look down through the tube.