Bulk Aquarium Supplies / Substrates, Gravel and Sand / Bioscape Coral Rubble 5kg

Item # COR03

Aquarium Coral Substrate 20-50mm pieces

• 5kg bag of coral rubble (20–50mm diameter pieces)
• 100% natural and safe for all aquarium types
• Buffers pH and adds calcium to stabilise water
• Excellent biological filter media for marine systems
• Perfect for sumps, filters, and reef aquascaping

The Bioscape Coral Rubble 5kg (20–50mm) is a high-quality natural media designed to improve biological filtration, buffer pH, and maintain long-term water stability in marine, reef, and cichlid aquariums. Each rubble piece ranges between 20mm and50 mm, offering the perfect size for sump chambers, refugiums, and canister filter compartments.

Made from 100% natural coral and aragonite, this rubble is naturally rich in calcium and carbonates that slowly dissolve over time, helping to maintain alkalinity, support coral skeleton growth, and stabilise water chemistry. Its coarse, irregular surface provides an excellent area for beneficial bacteria to colonise, enhancing nitrification and promoting clean, balanced water conditions.

The natural colour and texture of Bioscape Coral Rubble also make it ideal for decorative aquascaping, base rock layers, or as a substrate enhancer in marine and reef setups. It’s completely aquarium safe and will not cloud the water or release harmful compounds.

AU$41.50