Natural Volcanic Lava Rock (22 lbs/10 kg)

Enhance both the visual depth and biological function of your enclosures with 100% natural volcanic lava rock. Highly prized in both bioactive vivarium design and freshwater aquascaping, volcanic rock is structurally stable, naturally textured, and exceptionally porous.

Whether you need smaller graded stones for a lightweight, long-lasting drainage layer (false bottom) or larger textured boulders to construct stackable basking platforms, cave hides, and naturalistic waterfalls, this versatile volcanic stone is a staple hardscape material for terrestrial and aquatic setups alike.

Key Benefits for Habitats & Aquatics

• Superior Bioactive Drainage: The porous structure of smaller grades makes an ideal false bottom beneath terrarium mesh and substrate, preventing soil saturation and root rot while remaining far lighter than standard gravel.
• Massive Biological Surface Area: Millions of microscopic pores provide maximum surface area for beneficial nitrifying bacteria in aquatic tanks and a humid refuge for cleanup crew microfauna (springtails and isopods) in vivariums.
• Natural Grip & Plant Anchoring: The rough, craggy exterior makes it effortless to anchor terrestrial mosses, java fern, anubias, or creeping vines using aquarium-safe gel glue or thread.
• Heat-Retentive Basking Stone: Absorbs and radiates gentle belly heat beneath basking lamps, creating safe, comfortable thermal zones for lizards and snakes.
• 100% Natural & Inert: Untreated volcanic stone that will not leach chemicals, toxins, or alter aquatic pH levels over time.

Size Recommendations

• 1–2 cm (~0.4" – 0.8"): Ideal for standard bioactive terrarium drainage layers (false bottoms), aquarium biological filter media bags, and high-porosity potting mixes.
• 5–8 cm (~2.0" – 3.1"): Medium hardscape stones suitable for stacking basking ledges, building small hides, and anchoring plants.
• 10–30 cm (~4.0" – 12.0"): Large centerpiece boulders, dramatic aquascape focal points, and substantial basking ledges for larger reptiles.

Bag Size & Volume Estimates

• 10 kg (~22 lbs): Yields approximately 3.5 to 4 US gallons of volume. Ideal for small to mid-sized terrariums (up to 40 gallons) or nano to medium aquariums.

Preparation Note

• Natural stone generates volcanic dust during mining and transit. Always rinse thoroughly with clean running water in a bucket or strainer until the runoff runs clear before adding to your habitat or aquarium.