Diatomaceous Earth Filter Powder For De Pool Filters 25 Lbs
Diatomaceous Earth Filter Powder for DE Pool Filters – 25 lb Bag
Diatomaceous earth (DE) is a naturally occurring siliceous sediment composed of the fossilized frustules of diatoms. When milled to a controlled particle size range, it forms a porous filter medium that builds a permeable cake on the filter grids, capturing particles as small as 1–5 µm while allowing water to pass at low differential pressure.
Key Technical Characteristics
| Property | Typical Value | Units | Notes / Test Method |
|---|---|---|---|
| Particle size (D50) | 15–25 | µm | Laser diffraction, dry powder |
| Specific surface area | 40–55 | m²/g | BET nitrogen adsorption |
| Bulk density (loose) | 0.20–0.25 | g/cm³ | ASTM C29 |
| Moisture content (max) | 0.5 | % wt | Karl Fischer titration |
| Silica (SiO₂) content | ≥85 | % wt | XRF analysis |
| pH (10% slurry) | 7–9 | – | ASTM D1293 |
The particle size distribution determines the permeability of the filter cake and the size of contaminants that can be retained. A D50 around 20 µm provides a balance between high turbidity removal and manageable head loss in typical DE filter systems operating at 1–2 ft³/min per square foot of filter area.
Typical Applications in Pool Filtration
DE filters are selected when the target effluent clarity requires removal of fine particulates that exceed the capability of sand or cartridge media. The fine pore structure of the DE cake enables consistent removal of algae spores, fine dust, and micron‑sized contaminants, reducing the need for frequent backwashing and lowering chemical consumption.
- Residential swimming pools where water clarity is a primary aesthetic and health concern.
- Commercial pool facilities, such as hotel and resort pools, that must meet strict health‑department turbidity limits.
- Therapeutic spas and hot tubs where low turbidity and minimal chemical irritation are desired.
- Water‑park surge pools and wave‑generation chambers that experience high bather loads and require rapid particulate capture.
Handling and Storage Considerations
DE powder is hygroscopic; exposure to moisture can cause agglomeration, which alters flow properties and increases the required pre‑coat amount. The product is supplied in a multi‑wall, moisture‑resistant bag with an inner polyethylene liner to maintain low moisture content during transport and storage. Store in a dry, cool environment away from direct sunlight and keep the bag sealed when not in use.
Quality Control and Consistency
Each lot is sieved to verify that the particle size distribution remains within the specified range, and moisture content is tested before packaging. Chemical composition is monitored by X‑ray fluorescence to ensure silica purity, which directly influences chemical inertness and resistance to degradation in chlorinated or brominated pool water.
Frequently Asked Questions
| Question | Answer |
|---|---|
| Can the particle size be customized for specific filter designs? | Yes, the milling process can be adjusted to achieve alternative D50 values (e.g., 10 µm for finer filtration or 30 µm for lower pressure drop) subject to minimum order quantities. |
| What information is needed to obtain a quotation? | Required details include desired bag size (e.g., 25 lb), target particle size range, any specific moisture content limits, and delivery destination for freight calculation. |
| Is the product compatible with both chlorine and bromine sanitizer systems? | The silica‑based DE is chemically inert to typical pool sanitizers; however, prolonged exposure to very low pH (< 6.5) may cause surface dissolution, so maintaining pool water pH within the recommended 7.2–7.8 range is advised. |
| How is the powder packaged to prevent contamination? | Each bag incorporates an inner polyethylene liner and an outer multi‑wall paper sack, sealed with a heat‑seal closure to block moisture and particulates. |
Request Technical Data Sheet or Sample
For detailed specifications, safety data, or to arrange a sample of the 25 lb DE filter powder, please contact our technical sales team using the link below.
Contact Technical Sales