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Black Star Lava Rock is admired for its bold, porous structure and rugged volcanic origins. Formed from cooled lava and textured by natural gas release, each piece carries a unique cratered surface that adds drama and depth to aquascapes. With its dark coloration and lightweight form, this rock is perfect for wild layouts, rugged canyon scapes, and naturalistic builds that need both texture and shadow. Its inert properties make it safe and versatile for a wide range of freshwater aquariums.
Origin: Indonesia – Java volcanic field
Water Chemistry Impact: Inert and stable; does not affect pH or hardness (KH & GH)
Compatibility: Great for planted tanks; safe for shrimp, snails, and small fish
Restrictions: Rinse and pre-soak; avoid hard impact or excessive weight stacking
Aquascape Style: Bold, porous structures for wild or rugged layouts
Placement: Background clusters, dramatic centerpiece stones, or accent pieces
Special Features: Highly porous volcanic texture, lightweight, shrimp safe
Water: Fully inert; safe for all freshwater aquariums
Tank Size: Works in both nano aquariums and large aquascapes
Substrate Pairing: Contrasts well with sand, gravel, or planted substrates
Design Tip: Use clusters to create volcanic outcrops or dramatic shadowed formations
Appearance: Porous volcanic stone with cratered surfaces
Color: Dark gray to black with subtle natural variation
Texture: Lightweight and porous, with rough but rounded edges
Impact: Adds wild, rugged texture and dramatic focal points
Preparation: Rinse thoroughly and pre-soak to release trapped air before use
Placement: Avoid stacking under heavy weight; ensure stability in layered scapes
Maintenance: Stable and inert; porous texture may collect algae or debris over time
Special Tips: Works beautifully with mosses and epiphytic plants that anchor into porous surfaces
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.