Our Ketapang is from Top Quality (Use by Fish Farm) - HAVE A BREEDING FISH? ADD CATAPPA --- The tropical fishes create bubble nest using a floating leaf or plant to anchor their bubbles. - Blackwater, or tannin-rich water has many great benefits for fishes like tetra, discus, and goldfish. It may turn the water black initially, but gives natural water condition to them - Simply drop a few leaves into the water and you’ll notice the water turning brown (or yellow) in just a few hours. Remove only when the leaves start to disintegrate. - Always rinse before use, even after boiling or soaking. By the way, a "post-boil soak" in fresh water with a bag of activated carbon is a recommended step too.