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Porosity Chart
Blue Line Robotic cleaners will remove all debris down to 2 microns. Pool Buster will remove all particles down to 10 microns in size, while Garden Hose Wands will not remove anything smaller than medium sand.  A micron (micrometer) is a measure that is 1 millionths of a meter (39.3 inches) in length, or 1 thousands of a millimeter.  Generally, the human eye cannot see any thing smaller than 20 microns.  Many pool contaminants are much larger than 20 microns … leaves, twigs, gravel, etc., however even more are invisible to the human eye.  Garden hose and most other so-called pool vacs use attached filter bags of a mesh-like construction, so large that they are not rated in microns, and will not remove fine sand and silt, much less algae and bacteria. 

Substance

Micron Rating/Range

Gravel

2,000-10,000 microns

Course Sand

1,000 to 5,000 microns

Medium Sand

800 to 2,000 microns

Beach Sand

100 to 2,000 microns

Fine Sand

250 to 9,000 microns

Silt

2 to 20 microns

Fertilizer

10 to 10,000 microns

Table Salt

100-120 microns

Pollens

10 to 1,000 microns

Human Hair

40 to 300 microns

Mold Spores

10 to 30 microns

Coal Dust

1 to 100 microns

Algae

.5 to 20 microns

Bacteria

.5 to 20 microns

Atmospheric Dust

.001 to 30 microns

 

 
 

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