Rinse filter cartridge or D.E. Grids thoroughly to remove any loose matter/debris. While wet, spray Instant Filter Cleaner on total surface area and allow to set for 3-5 minutes. Rinse thoroughly and reinstall in filter system. Note: It is recommended that 2-3 times a year that you soak the cartridge in a solution of Phoenix Filter Cleaner for 24 hours.
- Works in minutes!