Microbe Lift Clarifier Plus will quickly clear cloudy water in your Reef or Marine aquarium. - Will keep your aquarium water crystal clear. - Safe for all your marine fish and invertebrates. - Will not cause invertebrates to close up or coat your fishes gills. - Nitrate phosphate and silicate free. Directions... Add Reef Marine Clarifier Plus as listed below for the clarifying and \"polishing\" purpose intended. Application may be repeated several times if warranted at 24 hour intervals. Product is safe for fish corals invertebrates and filter-feeders and will not affect pH. On application product may appear slightly cloudy in your tankwater but this disappears quickly. 8fl.oz(237ml) will treat up to 1180 gallons (4660 litres) **PLEASE NOTE. ALL MICROBE-LIFT PRODUCT INSTRUCTIONS ARE GIVEN IN U.S GALLONS** 1 U.S GALLON = 3.78 LITRES 1 IMPERIAL GALLON = 4.54 LITRES.