Tantora Premium Grade Catappa Indian Almond Leaves Size Xl 18-30cm (Leave size : 7-12 / 18~30cm ) x 10 Leaves,suits to medium size fish tank. Recommend using 1 leave per 50 liters of water. Relieve aquarium stress of fish and shrimps. Stress is one critical factor which leads to high mortality rate of aquarium animals. Mimic the natural habitat of fish and shrimp. Make them feel like living in their natural environment. Rich in Tannin. Has antibacterial and antifungal properties and help reduce the chance of bacterial infections and improve aquarium animals health. Stimulate reproduction rate of aquarium animal.