Active Glass Filter Media 15kg Coarse | Advanced Pool Filter Media Upgrade
Active Glass Filter Media is an advanced pool filtration media engineered to outperform both traditional silica sand and conventional glass media. Unlike standard filter media, it carries a permanent negative electrical charge (Zeta Potential) applied during manufacturing, continuously attracting organic molecules for superior filtration. The result is cleaner water, more efficient backwashing, and a lower overall maintenance burden for your pool.
This listing is for the Coarse grade (3mm to 7mm) - used as the bottom layer of the filter bed. Pair with Active Glass Filter Media 15kg Fine Grade to fill the top 65% of the filter bed for optimal performance.
Product Specifications
| Media Type | Active negatively charged recycled glass (Zeta Potential) |
| Grade | Coarse (3mm to 7mm) |
| Filter Bed Position | Bottom layer of the filter bed |
| Bag Weight | 15kg |
| Filtration Rating | Down to 5 microns at 20m3/m2 filter area flow rate |
| Comparison | Sand and conventional glass filter to 20-30 microns |
| Backwash Saving | Up to 50% less water flow required vs sand or conventional glass |
| Material | 100% recycled plate glass |
| pH Dependency | None - effective across all standard pool water pH ranges |
| Compatible With | Standard sand filter tanks - direct replacement, no modifications required |
Key Features
- Permanent Zeta Potential Charge. Applied during manufacturing and lasting for the life of the media, continuously attracting organic molecules and fine particles that sand and standard glass miss.
- Filters Down to 5 Microns. Significantly finer than sand or conventional glass media (20-30 microns) for noticeably clearer water.
- Up to 50% Less Backwash Water Required. More efficient particle capture means less water and energy used on backwashing.
- Reduces Bacteria and Virus Load in Filter Bed. Leaves more free chlorine available to sanitise pool water and helps reduce combined chlorine odour.
- pH Independent Performance. Effective filtration year-round without pH dependency.
- Variable Speed Pump Compatible. Performs effectively at lower flow rates, supporting energy-efficient pump operation.
- 100% Recycled Plate Glass. A sustainable, environmentally responsible filtration choice.
Active Glass vs Sand vs Standard Glass
| Feature | Active Glass Media | Sand / Standard Glass |
| Filtration Rating | 5 microns | 20-30 microns |
| Electrostatic Charge | Yes (permanent Zeta Potential) | No |
| Backwash Efficiency | Up to 50% less water required | Standard |
| Bacteria Inhibition | Yes | No |
| pH Dependency | None | Variable |
| Material | 100% recycled plate glass | Virgin silica / standard glass |
Media Grading and Filter Bed Setup
Active glass filter media is available in two grades designed to work together for optimal performance:
- Coarse grade (3mm to 7mm) - this product: Bottom layer of the filter bed.
- Fine grade (1mm to 3mm): Fills the top 65% of the filter bed.
Check your filter manufacturer's guidelines for the correct media loading depth and total media volume required before purchasing.
Filters That Include Active Glass Media
Looking for a complete filtration solution? Our P Series pool filters come supplied with active glass media included:
- P400 Swimming Pool Filter - up to 36,000L, includes glass media.
- P550 Swimming Pool Filter - up to 57,000L, includes glass media.
- P600 Swimming Pool Filter - up to 81,000L, includes glass media.
Recommended Accessories
- Active Glass Filter Media 15kg Fine Grade - pair with this coarse grade to complete your two-grade filter bed setup.
- 5-in-1 Test Strips - test water chemistry after changing filter media.
- Crystalline Chlorine 4kg - maintain correct chlorine levels alongside upgraded filtration.
Frequently Asked Questions
Q: What is the difference between glass media and sand?
A: Sand filters pool water down to 20-30 microns. Active glass filter media filters down to 5 microns, capturing far finer particles for cleaner, clearer water. Glass media also lasts longer, requires less frequent backwashing, and inhibits bacteria growth within the filter bed.
Q: What makes active glass media different from standard glass media?
A: Active glass media carries a permanent negative electrical charge (Zeta Potential) applied during manufacturing. This charge attracts organic molecules, bacteria, and fine particles that standard glass media cannot capture. The charge lasts for the life of the media and works regardless of pool water pH.
Q: Does it help reduce backwashing?
A: Yes - active glass media may require up to 50% less water flow to backwash effectively compared with sand or conventional glass media, which can result in meaningful water and energy savings over time.
Q: What are the coarse and fine grades for?
A: The two grades work together in the filter bed. Coarse grade (3mm to 7mm) goes at the bottom of the filter. Fine grade (1mm to 3mm) fills the top 65% of the filter bed. Using both grades together maximises filtration performance.
Q: Is it a direct replacement for sand in my existing filter?
A: Yes - active glass filter media is a direct drop-in replacement for silica sand in standard sand filter tanks. No modifications to your filter are required.
Q: Is it suitable for variable speed pumps?
A: Yes - active glass media performs effectively at lower flow rates, making it well suited to variable speed pump systems running at reduced speeds for energy efficiency.
Q: Will it reduce my chemical usage?
A: It can help. By reducing bacteria and organic load within the filter bed, more free chlorine remains available to sanitise the pool water. This can result in lower overall chemical consumption and reduced combined chlorine levels.
Q: Is it made from recycled glass?
A: Yes - active glass filter media is made from 100% recycled plate glass, making it a sustainable and environmentally responsible alternative to virgin silica sand.
Pickup and Delivery
Perfect Pools Service Warehouse - 15C Douglas Alexander Parade, Albany, Auckland
Hours: Mon-Fri 9am-4pm | Sat 10am-2pm
NZ-wide delivery available. Charges calculated at checkout.
Questions? Email perfectpoolsnz@gmail.com or visit our contact page.
