Description Sera Pond Bio Humin is a product for protection from sunlight on garden ponds. Strong sunlight causes turbidity of the water. In addition to deteriorating appearance, turbidity is a threat to biological balance. The natural humus substances in the preparation provide immediate shade and therefore the water in the pond remains transparent. Directions for use: Shake the bottle well before use. Use the cap as a measure – 1 full cap (14 ml) for 280 liters of water. For optimal results, mix the detergent well in the water. We recommend using the product once a week. It can be used twice a week in case of very cloudy water or very strong sunlight. It does not contain preservatives and artificial colors. Caution: Keep out of reach of children and pets!