Hi All...Just a bit of info regarding the leaves.
I was introduced to leaves by a couple of Thai Betta breeders. When the Indian Almond dried leaves are placed into the water, a strong brown dye is given off. The dye contains organic acids humic and tannins. The water darkens to a yellowish brown (tea-like color) after a few days, which is exactly the same as the Betta fishes' natural habitat. The changed water seems to harden their scales. It helps them heal wounds and ward off illnesses.
The humic and tannins from the Indian almond leaves also lowers the pH of the water, absorbs harmful chemicals and helps create a soothing and calm environment for the fish. The leaves can also be used to treat bacteria infection and help the Bettas recover from injuries. Some people also use them to increase breeding frequency. But be careful, because it also makes the male more aggressive at breeding time. On the other hand, it also helps the female recover from any wounds she receives during the breeding process.
I use one square-inch of leaf per half-gallon of water for individual fish. One leaf per 10-gallon rearing tank for the fry. One-leaf per half-filled 10-gallon breeding tank.