Tall cylindrical pool filter cartridge with white pleated fabric and blue edge caps with a front label
Tall cylindrical pool filter cartridge with white pleated material and blue edges on a plain background
cylindrical pool filter cartridge with a blue plastic end cap and a hollow core showing filter material inside
close-up view of the blue end of a cylindrical pool filter cartridge showing the hollow center and interior structure

Unicel Replacement Filter Cartridge 50 sq. ft. Hayward Star-Clear C500 CX500RE | C-7656

Regular price$56.99
/
$9.99 flat shipping on orders under $100.
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SKU:
C-7656
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About This Item

The Unicel C-7656 is a 50 sq. ft. replacement filter cartridge engineered to Unicel's precision manufacturing standards. Built with 108 pleats of 4 oz. Reemay 2040 polyester media, this cartridge delivers consistent water clarity and extended service life as a direct replacement for the Hayward Star-Clear C500 (CX500RE) and compatible spa filter systems.

Specifications

Filter Area 50 sq. ft.
Length 19 5/8"
Outer Diameter 7"
Top Inner Diameter 3"
Bottom Inner Diameter 3"
Material 4 oz. Reemay 2040
Pleat Count 108
Top Cap: open w/ molded gasket
Top Cap
Bottom Cap: open w/ molded gasket
Bottom Cap

Fits into:

OEM Brand Product Name Part Number Notes
Cal Spas - - -
Hayward Star-Clear C500 CX500RE -
Hollibaugh Spas - - -
PDC Spas - - -

(This is not an exhaustive list.)

Also known as: C7656

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Unicel Filter Cartridges and DE Grids

About Unicel Filter Cartridges and DE Grids

The "Gold Standard" of Replacement Cartridges
For over 50 years, Unicel (Meissner Mfg.) has been the professional's choice for restoring pool water clarity. While generic "knock-off" filters often use cheap, fuzzy fabric that clogs quickly, Unicel uses genuine Reemay® Filtration Media. This patented synthetic fiber features a unique trilobal shape that traps significantly more dirt and oils without choking your pump's water flow. Based in California, Unicel doesn't just copy filter dimensions; they engineer them to strict Original Equipment Manufacturer (OEM) specifications. This ensures a "lock-tight" fit in your filter tank, preventing debris from bypassing the system and returning to your pool.

Why We Trust Unicel Filter Cartridges and DE Grids
Genuine Reemay® Media: Uses continuous trilobal fibers to capture microscopic debris without restricting water flow.

Precision "Exact Fit": Engineered to match your tank's original specifications for a 100% leak-free seal.

Made in the USA: Manufactured in California with heavy-duty urethane end caps that resist cracking under pressure.

Longer Lifespan: Sharp, rigid pleats resist collapsing during cleaning, meaning you buy fewer replacements over time.

More about Pool and Spa Filter Cartridges

Complete Your Pool Care Routine

Essential Pairing
Filter Cleaning Chemicals for All Types of Pool & Spa Filters

Using a specialized cleaner like FilterWash helps release deeply embedded oils and minerals that standard rinsing leaves behind.

Shop Filter Cleaning Chemicals for All Types of Pool & Spa Filters
Highly Recommended
Pool and Spa Plumbing Lubricants

Every time you open your filter tank, you must lubricate the O-ring to prevent dangerous leaks and ensure a watertight seal.

Shop Pool and Spa Plumbing Lubricants
Pro Tip: Don't Forget
Pool Test Kits and Water Analysis Tools

Balanced water pH prevents calcium scale from hardening your filter fabric and ruining your new cartridges.

Shop Pool Test Kits and Water Analysis Tools

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