Mineral as well as dead organic material may lead to cloudiness. The latter may additionally raise the phosphate level in water and thus support algae growth. sera phosvec-clear immediately binds the cloudiness and makes it collectable for the filter. At the same time it removes excess phosphate and thus prevents algae growth.sera phosvec-clear+ removes mineral cloudiness+ removes phosphate+ for crystal clear, clean waterDosage and application sera phosvec-clearDo not use if the carbonate hardness is below 6dKH - danger of suddenly sinking pH values! (Check with the sera kH-Test before application, if applicable increase with sera KH/pH-plus, monitor the pH value with the sera pH-Test during application.) Add 5 ml of sera phosvecclear for every 5.3 US gal. (20 l) of water. Ensure good aeration during the application!