Buffer Plus™ Still using the same old buffers? 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 the 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. Step up to the new technology of buffers, Buffer Plus™.8 oz