Dual Action Treatment: Natural Chemistry's Pool Perfect + Phosfree provides pool owners with an effective dual-action treatment to help remove phosphates, and use natural enzymes to keep water clean and clear. Broad Spectrum Enzymes: Pool Perfect + Phosfree natural enzymes keep water clear of non-living organic materials, simplifying overall pool maintenance by increasing the efficiency of the filtering system, along with eliminating strong odors and waterline rings, all without having to use harsh chemicals or materials. Easy Pool Maintenance: The benefits of our SMARTZyme​ technology combined with our phosphate removal provides superior water quality with less work. Pool Perfect + PHOSfree​ is added to the skimmer and to reduce clouding during phosphate remover. Directions: Shake Well Before Using - Contents Settle. Each week, with filter running, simply add to your skimmer 1 capful per 8000 gallons (30,000L) of pool water, For example, two capfuls per week will treat a 16,000 gallon (60,000L) pool. Tested and Proven Effective: Natural Chemistry products are known for delivering reliable results and making water care less complex. Natural Chemistry carries an extensive line of pool and spa solutions that match your unique needs. Natural Chemistry has developed a regular maintenance program to continually remove phosphates as they enter the water.