Tannins, found in substances like Catappa leaves, offer several benefits in aquariums, making them a popular choice among hobbyists.

They have plenty of advantages!

Tannins help to prevent fungal and bacterial infections in fish and their eggs, reducing the risk of disease in the aquarium. By influencing water chemistry, tannins can slow down or even eliminate algae growth, keeping your aquarium cleaner and reducing maintenance.

Tannins can also help manage populations of pest snails and crustaceans, which can otherwise become problematic in aquariums.

Fish species that thrive in low pH and soft water conditions will benefit from tannins, often showing more vibrant colors and increased spawning behaviors, and enjoying the shade provided by the leaves.

Fry, shrimp, and other small inhabitants find shelter among the leaves, enhancing their survival rates.

Many ornamental shrimp species consume biofilm that grows on the decaying leaves, providing a natural food source.