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Black Lava Rock is a dramatic hardscape material formed from cooled volcanic magma, admired for its rugged appearance and porous surface. Its deep black coloration adds bold contrast in aquascapes, while its lightweight, hole-filled structure makes it easy to stack and secure. Ideal for rugged nature layouts and dramatic “Skull Island” style builds, Black Lava Rock provides both texture and shadow, helping aquascapers create powerful, eye-catching designs that feel raw and untamed.
Origin: Volcanic regions – cooled magma
Water Chemistry Impact: Inert and stable; does not affect pH or hardness (KH & GH)
Compatibility: Great for planted tanks; safe for shrimp, snails, and community fish
Restrictions: Smaller pieces may float due to high porosity
Aquascape Style: Rugged layouts, canyon builds, Skull Island-style aquascapes
Placement: Background structures, stacked formations, or dramatic centerpiece rockwork
Special Features: Lightweight, porous texture, bold black coloration, shrimp safe
Water: Completely inert; suitable for all freshwater aquariums
Tank Size: Works in nano tanks to large displays; lightweight for easy handling
Substrate Pairing: Contrasts beautifully with sand, soil, or light-colored substrates
Design Tip: Use stacked layers to form towering structures with dramatic shadowing
Appearance: Rugged volcanic rock with porous cavities
Color: Jet black to dark charcoal
Texture: Lightweight, rough, and highly porous
Impact: Creates dramatic contrast, depth, and bold scaping features
Preparation: Rinse thoroughly to remove volcanic dust before adding to aquarium
Placement: Ensure stability when stacking; smaller pieces may need anchoring due to buoyancy
Maintenance: Fully inert and stable; porous texture may collect debris or algae over time
Special Tips: Works well with mosses and epiphytic plants that can root into its porous surface
We ship orders within the contiguous United States. Ready-to-ship orders are processed within 1-3 business days. Please email us regarding the processing time on custom orders.