CaribSea's Buffer Plus is the easy way to buffer and re-mineralize marine and reef aquariums.  With both bicarbonate and time release aragonite buffer, Buffer Plus gives you the fast alkalinity adjustment and pH support you expect, as well as long term stability you need for a healthy marine aquarium.  Buffer Plus also contains calcium and trace elements such as strontium and magnesium for robust and vibrant corals, invertebrates, and coralline algae.