| Main centres: | 1-3 business days |
| Regional areas: | 3-4 business days |
| Remote areas: | 3-5 business days |
A 100% natural calcite substrate designed for reef, marine, and tropical aquariums. Gray Coast helps stabilize calcium and alkalinity, prevent large drops in pH, and provides a natural base for your aquarium's chemistry, while offering an attractive substrate that can enhance the look of your tank.
Natural calcite substrate for marine, reef, and tropical aquariums
Assists in stabilizing calcium and alkalinity
Helps prevent large pH declines
High in magnesium and trace minerals
Sold dry to provide more substrate per bag vs wet alternatives
Provides a natural calcite base that supports reef water chemistry
Helps maintain stable calcium and alkalinity levels
Reduces risk of sudden pH drops
Rich mineral content supports overall aquarium health
Rinse thoroughly before use to remove any residual dust.
Spread evenly across the aquarium bottom to desired depth.
Add water slowly to avoid disturbing the substrate.
Use mechanical filtration (filter floss) to clear initial cloudiness if needed.
