China Large Quantity Red Natural Lava Stone Water Treatment Volcanic Rocks

Large Quantity Red Natural Lava Stone Water Treatment Volcanic rocks
Description of the volcanic rocks :

Volcanic rocks are also called volcanic stones, pumice, pumice, basalt, and porous stones. The colors are red, black, and white.
The use of volcanic stones is: large volcanic stones for garden landscaping, volcanic stones for water treatment, volcanic stones for aquariums, volcanic stones for barbecues, soilless cultivation and succulent planting, and succulent planting are all 3-6mm, and the plate is used for exterior walls Ground bedding (volcanic slate, basalt slab, pumice slab), etc .
Specifications
1. Appearance and shape: no sharp granules, low resistance to water flow, not easy to block, uniform water distribution and air distribution; rough surface, fast film hanging speed, and microbial membrane is not easy to fall off during backwashing.
2. Porosity: Volcanic rocks are natural honeycomb porous, which is the growth environment of bacterial micelles.
3. Mechanical strength: 7.08Mpa by the national quality inspection department. It has been proved in practice that it can withstand the hydraulic shearing action of different strengths and its service life is much longer than other filter materials.
4. Density: Moderate density, easy to suspend and not run out during backwashing, which can save energy and reduce consumption.:
Chemical Composition:

SiO2CaOMgOFe2O3FeOAl2O3TiO2K2ONa2O53.82%8.36%2.46%9.08%1.12%16.89%0.06%2.30%2.55%

Packaging & Delivery
1. We usually use 1 ton plastic bag to pack it
2. We can devilery the goods after 7-10 days after we receive the payment

Quality Control:
1.Professional QC worker team
2.Three time check before ship
FAQ:

1)Q: Where is your company?
A: Our headquarters is located in Shijiazhuang, Hebei Province, factory in Yunnan, also with many cooperated factories around the domestic.
2) Q: What's the port of loading?
A: Normally Fangcheng Port or Qinzhou Port.
3) Q: How is your packing?
A: Normally we pack our stone with
4) Q: What about shipping mark?
A: We can provide neutral shipping mark, or customer trade mark / OEM trade mark are available.
5) Q: What's your sample policy?
A: Pay for Customized samples, free for standard samples.

The shipping fees is paid by client.
6) Q: What's your MOQ?
A: Usually 1*20'' container
7) Q: How can we guarantee the quality?
A: We'll send you the order update and product pictures for checking. QC inspection by yourself / your friend / 3rd QC agent is accepted.
8) Q: What's your payment term?
A: 30% deposit by TT, balance paid before shipment.
Should you have any questions, please feel free to inquire us at any of your convenience.