ACUREL - F250 Aquarium Water Clarifier - 8.45 fl. oz. (250 ml)DESCRIPTION Acurel F is the preferred choice of professionals for keeping aquarium water crystal clear. Fast acting and easy to use, Acurel F clears cloudy, green or polluted water within hours of application. It 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 the beneficial bacteria in biological filtration systems of healthy