Feedworks USA is proud to be the Distributor for Celtic Sea Minerals, based out of Cork, Ireland. Celtic Sea Minerals specializes in the development, manufacture and marketing of natural animal feed, hygiene and fertilizer products based on calcareous marine algae.

Celtic Sea Minerals harvests in two key locations: the original site off the south west coast of Ireland – which has been worked since 1991 – and a significant and plentiful new reserve in Arnarfjordur, a fiord in the north west of Iceland.


Calcareous marine algae is the collective term for several species of calcified red seaweed. Calcareous marine algae are very slow growing and can form extensive beds in favorable conditions, typically in relatively shallow and clear, unpolluted coastal waters where there is some tidal flow.

The live plant contains a pink pigment on its surface, which traps sunlight to provide energy for its growth. In time a dead, white calcareous skeleton develops which is rich in calcium and other minerals. It is only this dead material that is harvested from the seabed primarily for its significant value as an animal feed raw material.


Calmin is manufactured from calcareous marine algae, which is harvested from clean, unpolluted waters off the coasts of Ireland and Iceland. It is a source of  minerals deposited within its structure by the sea, especially calcium and magnesium.

Thanks to its unique honeycombed physical structure and large surface area, Calmin breaks down slowly. As Calmin breaks down it releases calcium and magnesium.

Calmin is OMRI Listed

OMRI-listed-logo-rgbCalmin may be used in certified organic production or food processing and handling according to the USDA National Organic Program Rule.

Click here to view Calmin’s OMRI Certificate