Acurel-Acurel F Water Clarifier. Fast-acting and easy to use, Acurel F clears cloudy, green or polluted water within hours. Acurel F combats the harmful effects of overfeeding and improves filter efficiency, resulting in a crystal clear environment for your fish. Safe and effective, it will not disturb beneficial bacteria in biological filter systems of healthy established aquariums. Made with organic extracts from renewable natural resources. Safe for all freshwater fish and plants. This 3.5x7 inch package contains one 50mL bottle of Acurel F and treats 530 gallons of water. WARNING: Not for human consumption. Keep out of reach of children. Made in the USA.