5kg Ocean Rock 

Various sizes 

Ocean Rock is a natural alkaline rock suitable for Saltwater Marine, African Rift Valley Hardwater Malawi/Tanganyikan cichlids, Intertidal brackish and coldwater due to its excellent buffering capacity.

Also ideal for Marine Aquariums.

Available in varying sizes, please advise whether you prefer small/medium rocks 

*This product will raise your pH

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