Aqua Ocean Premium Coral Sand – Size #5 (4-6mm) | 5kg Bag
Aqua Ocean Premium Coral Sand is a natural aragonite-based substrate sourced from pollution-free islands in the South China Sea. Free from phosphate, nitrate and surface contaminants, it is clean, safe and ready to use in marine and freshwater aquaria. The main component is calcium carbonate, which naturally buffers and stabilises pH in seawater, making it ideal for reef, marine and hard-water setups such as African cichlid tanks.
Key Features
- Grain Size: 4–6mm (Size #5 – Coarse)
- Weight: 5kg per bag
- Composition: Natural aragonite / calcium carbonate
- Origin: Pollution-free islands, South China Sea
- Free from: Phosphate, nitrate and surface contaminants
- pH Buffering: Helps stabilise pH in marine aquariums
- Large surface area – supports beneficial bacteria for biological filtration
Best For
- Marine and reef aquariums with high water flow
- African cichlid and hard-water tanks
- Tanks where finer sand tends to shift or create bare spots
- Use as a top layer over finer grades for a natural reef look
Instructions for Use
- Rinse thoroughly with fresh water before adding to your aquarium
- Recommended depth: 2.5–5cm for fish-only tanks, 5–7.5cm for deeper sand beds
- Add slowly to avoid clouding the water; clarity returns within a few hours
- Not recommended for soft-water or planted freshwater setups
🥄 Feeding Guide:
Serve at room temperature as a complementary food to support a balanced diet. Offer alongside dry food and ensure fresh water is always available. Store in a cool, dry place. Refrigerate after opening and use within 24 hours.

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