Soap and Water

• 1). Fill a bucket deep enough to submerge the pool filter cartridge in warm water. Add 1 cup of liquid dish soap per 5 gallons of water.
  
  
• 2). Submerge the dirty pool filter cartridge in the soapy water.
  
  
• 3). Allow the filter to soak for at least one hour, but no more than eight hours.
  
  
• 4). Remove the filter from the soapy water. Spray the filter with the hose to rinse off all of the soap residue.
  
  

Trisodium Phosphate

• 1). Add 1 cup of trisodium phosphate for every 5 gallons of warm water added to a bucket large enough to submerge the pool filter cartridge.
  
  
• 2). Submerge the dirty pool filter cartridge in the water.
  
  
• 3). Allow the filter to soak for at least one hour, but no more than eight hours.
  
  
• 4). Remove the filter from the soapy water. Spray the filter with the hose to rinse off all of the soap residue.