Water Filtration Media
If you manage an Effluent Treatment Plant (ETP), a Sewage Treatment Plant (STP), or a large commercial swimming pool in Bangalore, you know that the efficiency of your system depends entirely on what is inside the filter vessel.
Many facility managers make the mistake of using generic river sand or construction gravel for filtration. This leads to frequent clogging, poor water clarity, and damage to the pump systems.
At Stone & Rock Pebbles, we supply industrial-grade filtration media across Karnataka. In this post, we will break down the specific materials you need for a Multi-Grade Filter (MGF) or Dual Media Filter (DMF) and why purity matters.
The Foundation: Filter Gravel & Pebbles
The bottom layer of any pressure sand filter is not there to filter water; it is there to support the media above it. However, using the wrong shape or size can cause “channeling”—where water creates a tunnel through the sand, bypassing filtration entirely.
You need gravel that is:
- Rounded or Sub-angular: Sharp, broken stones pack too tightly and reduce flow.
- High Hardness: It must not break down under the weight of the water column.
- Washed: It must be free of clay and dust before installation.
Standard Sizes we stock in Bangalore:
- 2mm – 5mm (Fine Gravel)
- 5mm – 10mm (Medium Gravel)
- 10mm – 20mm (Coarse Gravel)
The Workhorse: Silex Sand (High Silica)
This is the most critical layer. Unlike construction sand, Silex Sand is high-purity quartz. It is chemically inert, meaning it won’t react with the chemicals in your water (like chlorine or acid).
We see many Bangalore industries struggling with turbidity because they use sand with high dirt content. High-quality Silex sand should have sharp edges to trap suspended solids effectively.
Our Specifications:
- Mesh Sizes: 12/20, 16/32, and 30/40.
- Purity: 98%+ Silica content.
- Application: Removing turbidity and suspended particles in Pressure Sand Filters (PSF).
For High Performance: Anthracite Media
If your plant requires a higher flow rate or finer filtration, a simple sand filter might not be enough. This is where Anthracite comes in.
Anthracite is a hard, compact variety of coal with high carbon content. Because it is lighter than sand, it sits on top of the sand layer in a “Dual Media Filter.”
Why add Anthracite?
- It traps larger particles before they hit the sand layer.
- It allows you to run the filter longer between backwashes (saving water).
- It reduces the pressure drop across the filter bed.
Why Supply Source Matters
Shipping heavy aggregates like sand and gravel from North India can double your cost due to logistics.
At Stone & Rock Pebbles, we are based locally in Ramohalli, South Bengaluru. We are the direct distributors. This means:
- Lower Costs: You aren't paying for cross-country transport.
- Immediate Stock: You can inspect the material physically at our warehouse before buying.
- Consistent Supply: We hold stock year-round for urgent replacements.
Conclusion
Whether you are re-bedding an old filter or commissioning a new plant, the quality of your media dictates the quality of your water. Don’t compromise on the purity of your sand or the grading of your gravel.
Need a quote for your plant? We supply small quantities for swimming pools and bulk truckloads for industrial plants.
Request a Quote from Karnataka & Tamil Nadu
Looking to buy in bulk from reliable pebbles manufacturers in Karnataka? Contact Stonen Rock Pebbles for competitive pricing, fast delivery, and expert advice.
We are South India’s largest wholesale dealer of natural pebbles, serving Karnataka and Tamil Nadu. Our premium range includes polished, river rock, lava rock, and aquarium pebbles—perfect for landscaping, water features, and aquariums.
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