Magna Clear will clear water in aquariums when water is cloudy or where gravel has dirtied the water. Ideal for new aquariums. Excellent for fish bowls. Magna Clear will assist filters in your aquarium to work more efficiently and also helps clear aquariums with insufficient filtration and bowls with no filtration. Magna Clear settles and collects suspended organic matter, which can then be easily siphoned off leaving your aquarium clear.