The same as Indian Almond leaves, and banana, guava leaves have the effect of reducing the pH of the water but not significantly. Moreover, the use of guava leaves is also very good for the aquarium. In particular, they soften more slowly than other leaves, so the time to use is longer. However, you also need to pay attention to replace other leaves after a while because the active ingredients in the leaves are no longer available.Benefits of guava leaves for aquarium: Has high antibacterial properties, preventing diseases such as Vibrio and Louminous bacteria. As a natural food source for shrimps Product information: 1 package of dried guava leaves with a generous amount (around 15-20+ leaves)How to use dried leaves in aquariums, shrimp tanks:Our guava leaves have been washed and dried, but you should wash them again before using them for the best results. About the dosage, 2,3 small leaf for 20 liters of water is optimal. Note: Please do not put too many in a tank, Ph will reduce quickly and it will release tons of ammonia! Use green or dried leaves? You should use dried leaves with a dark brown color. The leaves also have nutrients for fish, but the leaves have a lot of live sap, chlorophyll, ... and because the leaves are still fresh, when soaked in water, it will be more difficult to release nutrients, even water damage. Dried leaves only have fiber, and nutrients, so soaking dried leaves will be safer and more effective than soaking fresh leaves. How long can the leaves stay in the tank? the leaves when soaked in an aquarium can begin to release nutrients and antiseptic within 8-10 hours. You can see that after just a few hours the water starts to turn yellow. The longer or more water leaves, the darker the color will become. Since the water is light yellow or light brown, it may not be pleasing to the eye, especially if you keep your fish, shrimps in a glass tank. Soaked leaves can be left in the tank and do not need to be removed, which does not affect the quality of the water at all. After rotted, the leaves can be a food source for shrimps, snails or water micro-organisms.