"Phosphate-eliminating granulate, prevents algae
• Eliminates the basic nutrients of all types of algae, preventing the growth of unwanted algae.
• Significant reduction of high phosphate levels after only 24 hours.
• Effective for about 3 months.
• For all pond filters with filter material container.
• Includes net bag for individual dosage.
• Does not release aluminium or other undesired substances.