Acurel F Aquarium Clarifier clears cloudy, polluted water within hours. It removes suspended particles that makes your water dirty. It not only gives aquarium water that just polished look, but it also greatly improves filter efficiency. Acurel F is made of organic extracts from renewable natural resources and is safe for all cichlids and freshwater fish and plants. By removing suspended particles, it helps combat the harmful effects of overfeeding for better fish health. Enjoy clear water at all times.