Supplies › Seachem Reef Carbonate Image 1 of 1 Seachem Reef Carbonate $9.11 Raises carbonate alkalinity (KH)Concentrated (4,000 meq/L)Made with a blend of carbonate and bicarbonate salts Add To Cart Added! Raises carbonate alkalinity (KH)Concentrated (4,000 meq/L)Made with a blend of carbonate and bicarbonate salts Other Things You May Like Seachem MatrixCarbon $21.34 Seachem PhosGuard from $14.95 Seachem pH Alert $19.72 Seachem Malawi/Victoria Buffer $18.20 Seachem Flourish Phosphorus $12.28