Can you put these in a firepit and simply light the rocks? No gas needed?

Hi. The lava rocks do go into the fire pit. But you need to light the gas to heat the lava rocks. The lava rocks are not combustible. The lava rocks retain the heat and distribute the heat.

Is this safe too use in a aquarium filter ?

Indeed it is safe to use in aquariums. Prewash the rocks before use to get rid of the dust from the stones. We sell a huge amount to aquarium owners. Regards Peter

Can these be used below the gas burners to catch fat?

I lined my fat tray with strong foil then put a layer of cat litter to absorb the fat, easy clean up after a few uses.

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4KG Lava Rocks

Product ID: 49915793

Details

Brand
Black Rock
Colour
brown
Finish type
Unfinished
Fuel type
Natural Gas
Item weight
4000 Grams
Manufacturer
Black Rock

🌿4-8cm ideal size for versatile use

🔥4KG heat-retentive lava rocks

🪨100% pure, hand-sorted volcanic stone

Description

🔥 Elevate Your Outdoor Experience with Pure Volcanic Power!

HANDPICKED PURITY GUARANTEED - Each stone is meticulously hand-sorted to ensure 100% natural volcanic rock, free from dust and debris.
ECO FRIENDLY GARDEN ESSENTIAL - Suppresses weeds naturally and releases stored heat overnight, promoting healthier plants and soil.
MAXIMIZE YOUR GRILL EFFICIENCY - Retains and radiates heat evenly, cutting gas usage and flare-ups for a flawless BBQ every time.
AQUARIUM VIVARIUM GAME CHANGER - Enhances water quality by reducing nitrates and creates natural, textured habitats for reptiles and aquatic life.
MULTI FUNCTIONAL HEAT AESTHETIC BOOST - Perfect for fire pits, tandoor ovens, and garden landscaping—adds style while maintaining warmth longer.

Premium 4KG natural volcanic lava rocks, sized 4-8cm and hand-sorted for purity, designed to optimize heat retention and distribution for BBQs, fire pits, aquariums, and garden use. These 100% pure lava stones reduce fuel consumption, improve water quality in aquatic setups, and enhance garden aesthetics while providing natural weed suppression.

Specifications

ASIN	B00ECXW86A
Best Sellers Rank	9,147 in Garden ( See Top 100 in Garden ) 46 in Barbecuing Charcoal
Brand Name	Black Rock Grill
Colour	brown
Customer Reviews	4.5 4.5 out of 5 stars (2,155)
Finish Type	Unfinished
Fuel Type	Natural Gas
Item Weight	4000 Grams
Manufacturer	Black Rock Grill
Manufacturer Part Number	936
Material Type	Lava Rock
Model Number	936
Number of Items	1
Number of Packs	1
Product Style	4-8 cm (4 kg)
Unit Count	1.0 count

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