The Harmsco H-uSR35-AM cartridges offer superior water clarity, polish, and sparkle for your swimming pool water. The H-uSR35-AM cartridge is composed of polyester with anti-microbial Silver Zeolite technology. Combining silver into the filter media enables the cartridges to help eliminate odor-causing bacteria and inhibit growth of destructive mold and mildew. Its pleated media offers up to 12 times more surface area than other cartridges, meaning removal of more dirt, sediment, and other particulates for longer runs and fewer change-outs.
Harmsco® SureSafe™ Silver Zeolite technology has been effective against more than 650 strains of bacteria, fungi and molds in laboratory environments. It has completed FDA testing and is registered with the EPA.

Pool and Spa Water Test Kits
Features:

Anti-microbial Silver Zeolite technology
Cleanable & reusable
More surface area
Superior media construction
Consumer & industrial pool applications
Thermal bonding

Disclaimer: Harmsco® is a registered trademark of Harmsco, Inc, which is not affiliated or otherwise associated with Fresh Water Systems, Inc. or this site. Fresh Water Systems, Inc. acknowledges and confirms that it has not been granted any license or authority from Harmsco, Inc to use the mark, and further confirms that any and all use of the mark on this site is for identification and descriptive purposes only and such use is not intended to, does not, and shall not be deemed to imply any association or affiliation between Harmsco, Inc and Fresh Water Systems, Inc. of any nature whatsoever.

Cross References
Brand	Part#
Harmsco	H-USR35
Sta-Rite Posi-Flow/Posi-Flow II	WC108-55S2X
Unicel	UHD-SR35