Review on 🍃 SunGrow Mini Catappa Leaves: Optimize Aquarium pH, Reduce Stress in Fish, Shrimp, and Frogs, Create Natural Habitat, Unique Decor, 100 Pieces by Melissa Parker

I deducted 1 star as almost half of the sheets are crushed or broken. Maybe it was the seller or the delivery, but it was uncomfortable. That being said, it's Indian almond leaves that leach out tannins, but the effect won't be very pronounced in aquariums over 10-15 gallons unless you sprinkle the bottom with it. . I recommend boiling in a minimal amount of water (just what you will be using) for about 5 minutes, then adding leaves and water to the tank once it has cooled. If you don't need tannins, drain the water and use the leaves. If you have hard water with a high pH and want to lower that pH, I would also recommend using alder cones, cholla wood, or driftwood. You will also leach tannins in large amounts.