Dennerle Nano Catappa Bark -the tree bark of the tropical almond tree, for natural water care and decoration.+ for aquarium water similar to the tropical aquatic habitat+ for shrimps, crabs, crayfish and fish (discus, sucker catfish, tetra etc.)+ protects the mucous membrane and prevents infections+ particularly recommendable for aquaria with very large stocks of fish and plants+ content: ca. 8 pieces, 80 mmDosage Dennerle Nano Catappa Bark:4 cm of bark to 10 l of aquarium water (do not overdose). Rinse bark briefly with hot water and soak for 1-3 hours before use. Replace after 2-3 weeks or leave in the aquarium as a decoration feature. If tropical almond leaves are used simultaneously, reduce dosage accordingly.