Coral Rubble 1kg

Natural Calcium Source for Aquariums & RO Remineralization

Coral Rubble is a natural and effective way to increase carbonate hardness (kH), general hardness (gH), and stabilize pH levels in freshwater, marine, and reef aquariums. Made from crushed coral fragments, this mineral-rich media slowly releases calcium, magnesium, and trace elements—perfect for RO remineralization, hard water aquariums, or as a plant nutrient additive.

Ideal for use in filters, sumps, or as substrate support to maintain water chemistry balance naturally.

Key Features

• Raises kH and gH naturally to stabilize aquarium pH

• Ideal for RO/DI water remineralization

• Provides calcium and trace minerals beneficial to aquatic plants and invertebrates

• Suitable for freshwater, marine, and reef systems

• Can be used in filter bags, media reactors, or directly in the substrate

Usage Suggestions

• For RO remineralization: Add small amounts to the filter chamber or a media bag.

• For aquascaping or substrate use: Layer beneath gravel or use as decorative media.

• Rinse before use to remove fine dust.