Advantages: – Release tannins which have anti-Bacterial Properties that help to prevent diseases such as Vibrio and Luminous Bacteria – The shrimp either directly eat the leaves or graze on the bio-film that will accumulate on the leave. – Acidify the water. Lower pH level Suggestion: Add boiling water and soak till water logged. Rinse before adding to tank – 1 Leave for every 20l – Add or replace as and when needed.