Seachem Catappa Leaves
Catappa leaves from Indian Almond Trees (Terminalia catappa) help replicate natural environments for Bettas, shrimp, and other aquarium inhabitants. When added to an aquarium, they release tannins and other organic compounds which aid in maintaining lower pH and gently tinting water. These conditions mimic habitats with acidic water and abundant leaf litter. As catappa leaves decay, beneficial micro-organisms grow on the leaf surface, creating a natural source of food for shrimp, snails, and newly-hatched fish.
Directions:
- Add 1-2 leaves per 20 litres (5 US gallons)
- Remove and replace every month or as desired
- Leaves may float initially but will sink after 2 – 3 days
- To make an extract, boil three grams
| Specification | Value |
|---|---|
| Origin | Indian Almond Tree (Terminalia catappa) |
| Usage | Acquarium leaf litter for pH regulation and biological activity |
| Decay Time | Approximately 1-2 months |
| Water Tint | Gentle yellow-brown tint |
FAQ
How long do Catappa leaves last in an aquarium?
Catappa leaves typically last about 1 to 2 months before they need to be replaced. After this time, they begin to break down and lose their effectiveness in maintaining water conditions.
Do Catappa leaves affect the pH of the water?
Yes, Catappa leaves release tannins that help lower the pH of the water, creating a more acidic environment that mimics natural habitats for certain fish and invertebrates.
Can Catappa leaves be used in a freshwater aquarium with fish and shrimp?
Yes, Catappa leaves are suitable for freshwater aquariums and provide a natural habitat for shrimp, snails, and newly-hatched fish by supporting microbial growth.

Charles Newman –
I added one leaf per 20 litres in my Betta tank. After a week, the water turned slightly yellow and the pH dropped to 6.2, which is perfect for my fish. The shrimp have been active on the leaf surface and seem to be feeding well. I plan to replace it monthly.
Maria Burgess –
The leaves sink after a few days and create a natural look. My tank has a more stable pH now. I noticed more microorganisms and the water clarity improved slightly. A small investment for a natural setup.
Bella Black –
Used in a shrimp tank with Betta. The leaves provide a safe place for shrimp to hide and grow. The water tint is subtle but effective. I removed it after 30 days as recommended and replaced it with a fresh one.