AFM® Grade 1 is a fine‑grade activated glass filter medium engineered for high clarity filtration in pools and water treatment systems. With grain sizes between 0.4 and 1.0 mm, it captures fine particulates down to about 1 micron, while resisting biofouling and performance drift. The 25 kg bag delivers enough media for full filter bed replacement or upgrade, offering long‑term performance, reduced backwash frequency, and improved swimmer comfort.

• Key Features

• Grain size: 0.4‑1.0 mm (Grade 1)
• 25 kg bag size
• Made from recycled green & brown glass; activated to resist biological growth
• High negative surface charge and tight uniformity for efficient filtration
• Certified performance: removes ~95% of particles greater than 1 µm
• Bulk bed density approx. 1.25 kg/L

✓ Benefits

✓ Much finer filtering than conventional sand — superior water clarity
✓ Fewer backwash cycles — saves water and reduces maintenance effort
✓ Reduced chemical demand due to high performance with organics and micro‑particles
✓ Long service lifespan with stable performance over time
✓ Improved comfort: lower chloramine build‑up, reduced odour and irritation

Technical Specifications

• Particle Size Range: 0.4‑1.0 mm

• Removal Efficiency: ~95% for particles >1 µm

• Uniformity Coefficient: ~1.5‑1.8

• Bulk Bed Density (Uncompacted): ~1.25 kg/L

• Hardness: > 7 Mohs

• Bag Weight: 25 kg

What You Get

1 × 25 kg bag of AFM® Grade 1 Activated Filter Media (0.4‑1.0 mm)