Advanced Clarifier for all Freshwater and Planted Aquaria Overview Flocculant for improving water clarity in freshwater aquaria; helps eliminate cloudy water. Binds particulate material suspended in aquarium water, enabling removal from the system by means of mechanical filtration. Specifically formulated for use in freshwater aquaria; not to be used in marine aquaria. Safe for use with all manner of freshwater fishes, plants, and invertebrates.