Unicel | 5CH-352AM | Antimicrobial Cartridge Filter – 35 Sq. Ft. Replacement for Marquis Spas

The Unicel 5CH-352AM Cartridge Filter is a 35-square-foot antimicrobial replacement filter engineered for Marquis spas and compatible systems. Featuring Unicel’s advanced antimicrobial pleated media, this premium cartridge inhibits bacterial growth, resists biofilm formation, and delivers long-lasting water clarity and sanitation.

Key Features

• Genuine Unicel antimicrobial replacement cartridge (Model 5CH-352AM)

• 35 sq. ft. of pleated polyester media with antimicrobial protection

• Designed specifically for Marquis® and compatible spa filter systems

• Measures 5-3/16" diameter x 9-1/4" length

• Includes 2" MPT (male threaded) fitting for secure installation

• Antimicrobial media prevents bacteria and odor-causing biofilm buildup

• Reinforced center core ensures structural strength under pressure

• Resistant to spa chemicals, oils, and temperature fluctuations

• Easy to clean, reinstall, and maintain for long-term use

• Ideal for maintaining hygienic, crystal-clear water in residential spas

Product Overview
The Unicel 5CH-352AM Antimicrobial Cartridge Filter provides superior filtration performance and sanitation for Marquis spas. Its 35-square-foot antimicrobial pleated media not only captures dirt, debris, and oils efficiently but also actively resists microbial growth—extending filter life and improving overall water quality.

Built for strength and durability, the 5CH-352AM features a reinforced core and rugged end caps designed to handle the pressures of spa circulation systems. The antimicrobial media helps reduce maintenance frequency while keeping water cleaner between cleanings. Trusted by spa owners and professionals alike, this Unicel filter delivers exceptional clarity, safety, and reliability for long-term spa enjoyment.

Frequently Asked Questions

What is the Unicel 5CH-352AM spa filter?

It is a 35 sq ft antimicrobial cartridge made for Marquis spas and compatible systems.

How often should I clean or replace the 5CH-352AM?

Rinse spa cartridges regularly, and replace one that stays cloudy after cleaning or has torn or flattened pleats.

What does antimicrobial mean on the 5CH-352AM?

The media is made to inhibit bacteria growth and biofilm on the filter. It still needs regular rinsing and normal water care.