Indian almond leaves have been widely used by Asian breeders of tropical fish (Angel fish, Arowanas, Cardinals, Corydoras, Discus, Betta etc) to stimulate breeding and promote health and vitality in tropical fish. They love it! The betta fish is making bubble nest immediately after she placed the first leaf into her tank. Shrimps like to feed on the nutritious leaf after it softens in water. You can add the leaf directly into the tank or may be boiled and the extract to be added into the tank. In shrimp tanks these leaves are often used not only for their pH lowering ability, anti-fungal, or anti-bacterial properties but also as a food source for shrimp. When the leaves are left in the tank a multitude of microorganisms will begin to colonize the leave and break it down. These microorganisms create a bio film which is the preferred food source for shrimp, especially shrimp lets. Increasing the bio film in a tank will often result in higher survival rates for shrimp lets. These leaves can be left in the tank until they are fully eaten (the stem is usually left behind) and they will not have any negative impact on water quality. Besides shrimp these leaves are idea for betta's, discus, gouramis, killifish, tetras, arrowana, angelfish, South American dwarf cichlids, corys, plecos, and any other species that comes from black water habitats.