Acurel F50 Millimeter Water Clarifier, Aquarium, Treats 530 Gallons;

Acurel is the worlds best water clarifier. It is a green product, made from organic extracts from renewable natural resources. Acurel is a flocculent that gathers together the microscopic particles, making them catch in the filter. It is these particles that continue to pass through the filter that cause the green or cloudy water. With Acurel, you get crystal clear water in under 24 hours. The original and clearly the best.