Indian Almond Leaves [Terminalia catappa]
 
These leaves  be added to your tank for tannins, grazing or used as leave litter.
 
When added to an aquarium they will slowly breakdown releasing tannins and other substances into the aquarium.
 
Tannins help lower the pH of your water, They have also been shown to have antifungal properties.
 
They also contain a flavonoid called Quercetin.
Quercetin has been shown to have anti-inflammatory benefits in humans.
Due to being a natural product size and shape will vary.