Bring the blackwater to your betta and shrimp.Bettas, shrimp, and blackwater species evolved in soft, tannin-stained water full of leaf litter — a habitat plain tap water and a bare tank can't provide.Seachem Catappa Leaves, from the Indian Almond tree (Terminalia catappa), release beneficial tannins that gently lower pH and tint the water a natural tea color. As they break down they grow biofilm that feeds shrimp, snails, and fry, while their natural antibacterial and antifungal compounds help reduce stress, boost color, and support healing of minor fin damage. Pesticide-free and responsibly harvested.Seachem Laboratories, founded in 1979 in Madison, Georgia, is known for a science-driven approach to aquarium care, and it brings the same standard to its botanicals: these Catappa Leaves are pesticide-free and responsibly harvested, so the tannins and biofilm they release come from a clean, natural source you can trust in a shrimp or betta tank. Add 1–2 leaves depending on tank size. Let them release tannins and tint the water. Replace as they slowly break down. Create a natural blackwater habitat. Add to cart.Why Seachem Catappa Leaves Real blackwater conditions: release tannins that gently lower pH and tint the water a natural tea color. Natural food source: grow biofilm as they break down, feeding shrimp, snails, and fry. Antibacterial and antifungal: natural compounds help reduce stress, boost color, and support healing of minor fin damage. Clean and responsible: pesticide-free and responsibly harvested for sensitive shrimp and betta tanks. Best ForBlackwater, betta, and shrimp tanks — bettas, Caridina and Neocaridina shrimp, and soft-water species that thrive with leaf litter and tannins.FAQWhich fish and tanks is this for? Blackwater setups — bettas, shrimp, snails, and soft-water species that evolved in tannin-stained, leaf-littered water.How many leaves should I use per tank? Add 1–2 leaves depending on tank size, then adjust to taste as you watch the tint develop; replace them as they slowly break down.What do the leaves do besides tint the water? They lower pH gently, grow biofilm that feeds shrimp and fry, and release natural antibacterial and antifungal compounds that reduce stress and support healing.What It DoesReleases tannins and organic compounds that gently lower pH, tint the water, and create blackwater conditions; grows biofilm as a natural food for shrimp and fry; offers natural antibacterial and antifungal benefits that reduce stress and support healing.SizesSmall (5–6 inches) and Medium (6–7 inches).