Are these light weight for their size? How many rocks per 9 pounds?

Absolutely, the Premium Volcanic Lava Rocks are indeed lightweight for their size. A 9-pound bag typically contains about 30 to 40 rocks. This quantity is sufficient to cover an area approximately 17 inches by 14 inches.

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Black Rock Grill 4KG Lava for Gas BBQ, Fire pit, Aquarium, Chiminea (4KG)

Black Rock Grill 4KG Lava for Gas BBQ, Fire pit, Aquarium, Chiminea (4KG)

Product ID: 451874826

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Details

Brand
Black Rock
Flavour
Smoky
Item form
Irregular
Item weight
4000 Grams
Material
Lava Rock

🌿Natural mulch that retains moisture & suppresses weeds

🐠Enhances aquarium filtration & water quality

🔥4KG pure lava rock for consistent heat

Description

🔥 Ignite your grill and garden vibes with Black Rock Grill Lava Rocks!

GARDEN GLOW UP - Use as natural mulch to lock in soil moisture, suppress weeds, and release gentle heat to boost plant health.
GAS GRILL GAME CHANGER - Replace ceramic briquettes with lava rocks to reduce flare-ups, enhance smoky flavor, and save on gas usage.
AQUARIUM WELLNESS BOOST - Improve water filtration and nitrate removal while adding a sleek, natural aesthetic to your aquatic environment.
CONSISTENT HEAT EVERY TIME - Hand-sorted 100% pure lava rocks ensure uniform size and optimal heat distribution for flawless grilling and fire pit performance.
ELEVATE YOUR OUTDOOR EVENINGS - Create mesmerizing fire pit ambiance with durable, heat-retaining stones that protect burners and amplify warmth.

Black Rock Grill 4KG Lava Rocks are premium, hand-sorted volcanic stones designed for versatile use—from enhancing gas BBQ heat distribution and fire pit ambiance to improving aquarium water quality and garden health. Their uniform size and natural durability make them a must-have for millennial professionals seeking efficient, stylish, and multi-functional outdoor solutions.

Specifications

ASIN	B00ECXW86A
Batteries required	No
Best Sellers Rank	#31,829 in Pet Supplies ( See Top 100 in Pet Supplies ) #115 in Aquarium Décor Rocks
Customer Reviews	4.5 4.5 out of 5 stars (1,974)
Date First Available	15 November 2017
Item model number	936
Product Dimensions	30 x 23.01 x 15.01 cm; 4 kg
Scent	No scent

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