Tantora Banana Leaves are dried, raw, and organic. These leaves provide similar benefits to Catappa, Indian Almond, leaves in that they reduce water pH and relieve stress in fish and invertebrates. The leaves have antibacterial and anti-fungal properties. Soak 1-3 pieces in 1 gallon of water for 1-2 days. Use the resulting water as an additive to your aquarium.