The Four Types of Swimming Pool Filters

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The following four types of swimming pool filters are listed from least effective to most effective:

  1. High-Rate Sand Filter: Uses sand media to filter the pool water.  Most can filter down to 15 microns (not great).
  2. Cartridge Filter: Uses a cartridge much like the air filter in your car to filter the pool water.  Most can filter down to 10 microns (a little better). However, you must dis-assemble to clean.  What a headache!
  3. DE Filter:  Uses Diatomaceous Earth covered grids to filter the pool water.  Filters down to about 5 mircons (pretty good).  However, very expensive and grids easily break during cleaning.
  4. Glass Filter:  Uses NSF-61 certified glass media to filter the pool water.  Filters down to 2 microns (the best). Easy to cleanandonly needs to be cleaned once per month under normal conditions.  Glass media lasts 8 to 10 years!