Life Rock Original Per Kg

• Aragonite base, not cement - CaribSea builds Life Rock from an aragonitic base rather than the moulded cement used by some artificial rock, so it carries a genuine reef mineral profile through the tank's life.
• Micro and macro pore network - the porous structure gives nitrifying bacteria far more surface area to colonise than a solid rock of the same size would.
• Pre-coated to look established - the coralline-mimicking texture means the scape reads as "in" from day one, while real coralline algae fills in over the top as the tank matures.
• No curing required - nothing organic died to produce this rock, so there is no ammonia spike to wait out before you aquascape.
• Zero wild-collection risk - it is manufactured, not reef-harvested, so it does not arrive carrying aiptasia (pest anemones), bristleworms, mantis shrimp or other hitchhiker pests the way ocean live rock can.
• Every piece is unique - natural, irregular shapes and sizes. The product photo is representative of the range you will receive, not a guarantee of the exact pieces you get.

The industry rule of thumb for dry base rock is roughly 1 lb per US gallon of display volume as a starting point, which converts to about 0.12 kg per litre. That figure assumes a moderate, fairly solid-looking aquascape - build open, reef-style with large negative space for flow and coral placement and you will use noticeably less rock for the same visual impact.

Buy a little short rather than a little over. Because this rock is sold by the kilogram, it is easy to add a few more pieces later, and far easier than storing rock you did not end up needing.

Suitable for: building the base layer or full structure of a new marine or reef aquascape; reef keepers who want an established coralline look immediately rather than waiting months for real algae to spread; anyone who wants to avoid the pest risk that comes with ocean-collected live rock.

Not suitable for: freshwater aquariums - this is formulated, coated and marketed as a marine reef product, not a freshwater hardscape stone. If you want dry rock for a freshwater or cichlid tank, CaribSea's Mountain Stone and Dragon Stone ranges are the freshwater-specific options.

Loose Life Rock Original pieces, weighed to the kilograms ordered. There is no stabilising rod, cement, mortar or tools included - this is freeform aquascaping rock, stacked and arranged by hand. If you want a pre-shaped, self-supporting structure instead, see the Reef Tree Kit range in the comparison table above.

1. Rinse the pieces under tap water to clear dust - this is a courtesy rinse, not a cure, and does not remove the bacterial coating.
2. Dry-stack your aquascape outside the tank first. Life Rock is rigid enough to test different arrangements before anything touches water.
3. Place the finished structure directly on the glass base, not on top of sand, so it cannot topple if a fish or a future sand-sifter digs underneath.
4. Fill the tank and start the filter. The bacterial coating begins working immediately; there is no separate cycling step required beyond the normal check that ammonia and nitrite are reading zero before livestock goes in.

• CaribSea Life Rock Shapes - loose arches, rings and tunnels to break up a scape built mostly from Original base pieces.
• CaribSea Seaflor Special Grade Reef Sand - a sand bed in the same aragonite family, styled to sit under a Life Rock structure.
• Aquascaping mortar or rock-bonding putty (sold separately) - for permanently fixing a tall or top-heavy structure before livestock is stocked around it.

CaribSea does not publish a warranty term on its rock products. Your rights under the Australian Consumer Law apply regardless, and are not limited by anything the manufacturer does or does not offer.

Sold by weight, so freight scales with the kilograms ordered. A larger tank needing several tens of kilograms adds up quickly on freight, so check the total before ordering.

Do I need to cure CaribSea Life Rock before adding it to my tank?

No. Curing exists to let organic matter on wild live rock die off and be removed before it fouls the water. Life Rock is manufactured, not reef-harvested, so there is nothing to die off - a courtesy rinse to clear dust is the only preparation it needs.

Will real coralline algae grow over the artificial coating?

Yes, over time, under reef lighting and with stable water parameters. The pre-applied coating gives the scape an established look immediately; genuine coralline growth fills in on top of it as the tank matures.

Can I use Life Rock Original in a freshwater tank?

No. It is formulated and coated for marine and reef use. For a freshwater aquascape, use a freshwater-specific CaribSea rock such as Mountain Stone or Dragon Stone.

Will it raise my pH?

Yes, gradually. Like CaribSea's other aragonite-based products, Life Rock buffers water toward higher pH and carbonate hardness, which suits standard reef parameters and is not something you can switch off.

How many pieces will I get per kilogram?

It varies. Pieces are natural and irregular, ranging from fist to football sized, so the exact shapes, sizes and piece count vary with the pieces weighed out. Larger pieces can make up a kilogram on their own. The product photo is representative of the range, not a guarantee of what you will receive.