For professional use, suitable for hydroponics, tropical fish breeding, aquariums, laboratories, food & beverages, saliva, etc. Many aquatic plants and small tropical fish prefer weak acidity, but goldfish like alkali prefer.PH management is very important.Use this product to understand the pH changes in your precious tropical fish and other types of breeding water! PH management is essential for hydroponic cultivation and soil cultivation. Even if you do not know the exact PH of your lime with your eyes, the vegetables will not grow smoothly.Measure the pH as it is hydroponic.The pH of the soil is picked for a certain amount of soil, adding a certain amount of pure water or potassium chloride solution to measure the pH of its clarity. Use for daily and taste; Enjoy measuring pH in pools and homemade baths, enzymes, cosmetics, etc.Can be used for a variety of purposes, including reduced tea, reduced water, hydrogen water, pool water and acid water checking the disinfection power of water. In addition, in homes with elementary school children, the PH values such as cider and juice can be easily identified.