Black Lava Rock is a lightweight, highly porous volcanic rock popular for aquascaping and filtration. Its rough, dark texture creates a natural contrast with plants and fish, while its massive surface area provides ideal housing for beneficial nitrifying bacteria. Safe for both freshwater and marine tanks, it remains completely inert and will not alter water chemistry or pH levels.
Black Exotic Lava Rocks | 2.5KG
Black Exotic Lava Rocks | 2.5KG
Important note: This is a natural stone, being natural we won't be able to give you the exact pattern shown in the listing. We will pick random sizes and patterns equal to the weight you have purchased. For sizing, see details below.
sizing details
To request a specific rock size (Small, Medium, or Large), please leave a preference in your order notes at checkout or send us a follow-up email after placing your order. Size requests are fulfilled based on current stock availability. You are always welcome to contact us before ordering to confirm real-time stock levels for your preferred size.
LENGTH (AVERAGE)
Over 20cm
WEIGHT REQUIREMENT
Average stone in this size weighs upwards of 2-3kg. A minimum order qty of 2 amounts may be required for a single piece.
NOTE
Actual stone will vary from the images shown. As a natural element, exact colors, shapes, weights, and dimensions may differ slightly from the specifications listed above.
medium
LENGTH (AVERAGE)
12-18cm
WEIGHT REQUIREMENT
Average stone in this size weighs roughly 1-2kg. A minimum order qty of 2 amounts may be required for multiple good pieces.
NOTE
Actual stone will vary from the images shown. As a natural element, exact colors, shapes, weights, and dimensions may differ slightly from the specifications listed above.
small
LENGTH (AVERAGE)
Under 12cm
WEIGHT REQUIREMENT
Average stone in this size weighs under 500g. A single order qty is sufficient for multiple pieces.
NOTE
Actual stone will vary from the images shown. As a natural element, exact colors, shapes, weights, and dimensions may differ slightly from the specifications listed above.
Transform your aquarium with authentic, wild hardscape materials from Aquatees. We supply thousands of kilograms of naturally sourced aquarium rocks, premium driftwoods, Tweety wood, and fine sands—bringing raw, untreated nature straight to your tank. Because our hardscape is harvested directly from the environment, simply give your pieces a brief rinse to remove natural dust before building your dream aquascape.
Lava rock is exceptionally lightweight due to its porous structure, giving you significantly more visual volume per kilogram than denser stones. As a general guide, aim for 0.1 to 0.2 kg per liter for a standard layout (e.g., 6–12 kg for a 60-liter tank) or 0.25 kg per liter if you are building a heavily stacked, dramatic aquascape.
No. Lava rock is 100% inert and will not alter your aquarium's pH, KH, or overall water hardness.
Yes. Due to its porous, honeycomb structure, lava rock is very easy to break, split, or shape using a simple hammer, chisel, or screwdriver to create custom sizes and layouts for your aquascape.
Yes, rinse the rocks thoroughly in plain water to clear any fine volcanic dust or loose debris from the pores. Boiling or chemical cleaning is unnecessary.
Yes. When submerged underwater, lava rock naturally absorbs water and darkens, making black lava rock look deeper and richer, and red lava rock take on a darker, rust-red tone.
