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