DE pool filter powder is diatomaceous earth, a fine mineral media used in DE filters to help capture very small debris. When the pump runs, the powder coats the filter grids, creating a porous layer that traps particles the eye can’t easily see. This can help improve water clarity compared to broader media types.

• Use: Only with DE-style filters; it’s not for sand or cartridge systems.
• Application: Added through the skimmer with the pump running, following the filter’s manual.
• Shopping: Walmart offers pool care supplies online and in store, with pickup and delivery options.

Running a DE filter without powder means the grids aren’t coated, so the system may capture less fine debris and water can turn cloudy. Bare grids can also experience premature wear because they’re doing the work without the protective DE layer.

• Potential effects: Reduced filtration performance and more frequent cleaning needs.
• What to do: Add the recommended amount of DE as soon as practical, per your filter manual.
• Tip: After recharging, monitor your pressure gauge and water clarity; results vary by pool size and conditions.

Backwashing a DE filter typically removes most of the used powder, so it’s common to recharge with fresh DE right after the backwash cycle. The amount depends on your filter’s size and manufacturer guidance.

• Steps: With the pump running, add DE through the skimmer as directed.
• How much: Refer to your filter label or manual; avoid over-dosing.
• Check: Watch the pressure gauge and circulation. A moderate pressure rise after coating can be normal, but specifics vary by system.
• Note: If you did a light rinse, you might need less than a full recharge.

If your filter allows it, cellulose fiber media can be used as an alternative to DE powder. It’s designed to coat DE filter grids similarly and can capture fine particles.

• Compatibility: Always confirm in your filter manual before switching media.
• Performance: Filtration results vary by water conditions and system setup.
• Other options: Some pool owners choose different filter types (cartridge or sand), but that involves changing the filtration system rather than the media.
• Shopping: Explore pool maintenance supplies at Walmart, with convenient pickup and delivery.

Most DE filters are recharged by adding a slurry of powder and water into the skimmer while the pump is running. This helps the media distribute across the grids.

• Mix: In a bucket, stir DE powder with pool water to a milky slurry.
• Add: Pour slowly into the skimmer, allowing the pump to draw it in.
• Monitor: Check your pressure gauge and circulation as you add; stop at the recommended dose per your filter manual.
• Tip: Avoid clumps and keep the area tidy; follow all package directions.