Unicel FS-2004 48 sq ft Vertical DE Grid Replacement - Reliable

In this review of the Unicel FS-2004 grid set the bottom line is simple: it is a practical, cost-effective replacement for owners who need reliable diatomaceous earth filtration without paying for OEM pricing. The FS-2004 is designed as a full set of seven full and one partial grid that delivers 48 sq ft of fine-denier media and good permeability, so pools clear up quickly and run longer between backwashes. For pool owners who want straightforward compatibility and measurable water clarity gains, this grid set is worth considering.

Key Features

• 48 sq ft media: Provides ample surface area to capture debris and extend time between backwashes for less maintenance.
• High yarn count fabric: The fine denier fibers improve permeability and hold diatomaceous earth for finer filtration down to 2 to 5 microns.
• Optimized grid cloth design: Encourages even DE caking and lowers resistance to water flow for consistent performance across the set.
• Complete grid set: Includes seven full and one partial grid so users can perform a full replacement and restore original filtration area.
• Wide system compatibility: Fits many manufacturers including Hayward, Pentair, Sta-Rite and others, making it a flexible replacement option.

Who It's For

The Unicel FS-2004 is best for in-ground and above-ground pool owners with vertical DE filters who want a dependable aftermarket grid set that matches OEM sizing and restores filtration performance. It appeals to DIYers comfortable changing grids and those seeking a practical way to improve water clarity without buying a full new filter head or expensive brand-name grids.

It is less suited to someone who wants a premium, heavy-duty textile with extended tear resistance guarantees or those running highly unusual custom filter setups - in those cases an OEM-specific part or higher-spec industrial media may be preferable.

Pros & Cons

Pros

• Good fit and compatibility with many common DE filter systems, especially Hayward.
• Effective filtration performance that improves water clarity when used with DE powder.
• Complete kit includes all grids needed for a full replacement, simplifying installation.
• Offers value compared with higher-priced branded grids while matching performance in many users' experience.

Cons

• Some users report the grid cloth can tear more easily than heavier industrial options, so care is advised during handling and installation.
• Not an OEM-branded grid, so long-term durability may vary compared with factory parts.

Specifications

Model	FS-2004 grid set
Filter area	48 sq ft
Grid pieces	7 full + 1 partial
Media fabric	High yarn count, fine denier fibers
Typical filtration	Approximately 2 to 5 microns with DE
Dimensions (L x W)	24 x 11 in
Compatible brands	Hayward, Pentair, Sta-Rite, Pac-Fab, Jandy, Jacuzzi, Astral, American, Waterway

Our Verdict

The Unicel FS-2004 grid set is a solid aftermarket choice for most pool owners who need to restore DE filtration area and regain crystal-clear water without overspending. It balances effective fine filtration and broad compatibility, and while the cloth is not the thickest on the market, the value, fit and measured performance make it a smart buy for routine maintenance and seasonal overhauls.

Frequently Asked Questions

Will this grid set fit Hayward vertical DE filters?
Yes, the FS-2004 is commonly compatible with Hayward vertical DE filter systems and many users report a good fit.

How fine does the filtration get with these grids?
Used with diatomaceous earth powder the grid set filters down to an average of about 2 to 5 microns.

What is included in the package?
The set includes seven full grids and one partial grid to perform a full grid replacement in compatible vertical DE filters.