Terminalia catappa is a species of a tropical tree that grows in Asia. It is believed that by placing Indian almond leaves in the aquarium it will improve the health of the fish, reduce the presence of fungus, improve the immune system, and help with skin problems. The leaves are rich with tannins and chemicals and have been used by Betta breeders in Thailand for many years. They are also being used for conditioning the betta's water for breeding and hardening of the scales. As the organic material of the leaf is decomposed by beneficial fungi and bacteria it also releases minerals. This is an ideal environment for infusoria which shrimp and fry enjoy eating. The leaves can also be used to lower the PH and reduce heavy metals in the water.

Does anyone have any experience with these? I'd like to put them in my 30 gallon angelfish tank. Make it look more Amazon-y. Hope to see your posts!