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Seachem Gray Coast Calcite

Gray Coast Calcite is an all-natural calcite substrate for all types of marine, reef and tropical aquaria. Its chemical composition will assist in stabilizing calcium and alkalinity while preventing large pH declines.
Unlike competing ‘wet’ gravels, Gray Coast is sold dry.


Simply rinse before use to remove any residual dust.
When adding water to aquarium, fill slowly to avoid disturbing GrayCoast substrate bed. Place a bowl in the aquarium and add water directly to the bowl, allowing water to overflow softly on to the gravel bed. Initial cloudiness is normal. To remove cloudiness, use mechanical filtration (such as filter floss). Use Clarity to accelerate clearing.