What is a High Density Spa Cartridge Filter?
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1970's

When hot tub spas were first invented, pleated filters were used for filtration, but did not have very much square-footage of filtering material to provide for crystal clear water.  They had to be cleaned weekly and replaced often.

1980's

As spas got bigger, there was a necessity to increase the size and they number of pleats to provide clear water.  Notice that the space in between pleats in this photo is somewhat tighter than those in the the orange topped filter on the left.

1990's

Answering the call from consumers for even cleaner, easy to maintain water, filters were made with increasingly tighter, more numerous pleats in an attempt to filter out the contaminants found in spa water.  Notice how very tight the pleats in this filter are.  Manufacturers also compensated by making smaller filters that stack on top of each other (pictured) or in many instances simply kept increasing the height and width of the filters to provide clean water.

2000's

Now with the advent of High Density Micron Filters, the water is forced through microscopic caves and caverns (see below) made from Polypropylene fibers providing maximum high definition water clarity filtered down to 1 micron!

High Density Depth Filtration
High Density Depth filtration (Micron) is a process in which water is forced through microscopic caves and caverns in a tightly wound Polypropylene filter, rather than being sucked through a paper, pleated-type filter. This Polypropylene web forces the water particles to take a different path every time (see photo). High Density Depth filters use this same process and remove particles throughout the entire thickness of the filter.

The contaminants are taken out of the water two ways. By getting stuck in the Polypropylene web and by absorption into the material. Polypropylene removes these contaminants and traps them in its fibers, not letting them back into the water. The particles that would have formed a cake on the surface of a paper, pleated-type filter will now be spread throughout the entire High Density filter element instead. The path through the filter media is long and random. High Density Depth filters offer the best chance of contaminants to be captured in both the long term and the short term, and are more likely to capture semi-solids and particles of varying sizes. High Density Polypropylene Filters are not meant to be cleaned or reused.  Simply toss out after a few months and replace with a new one to ensure brilliant High Definition clarity for your spa water, with much less chemical use!

Under Normal spa conditions, HD Filters will last 2-4 months, Then just throw them out and replace with new ones.

Under Normal spa conditions, HD Filters will last 2-4 months, Then just throw them out and replace with new ones.