Lithaqua is a natural calcified seaweed. A pH buffer that can last a number of years. Lithaqua is a marine mineral sometimes referred to as coral, however it is calcified seaweed, high in trace elements and carbonates. Ideal for use in tanks and filter bays. Average particule size is 2-4mm. Modern filters contain many varied plastic media. These provide good support for bacteria, but Lithaqua goes one stage further. Not only do beneficial bacteria draw nutrients from the media, the media being of porous construction has a huge surface area up to 20 times greater than most plastic media. However the main advantage of Lithaqua is the high level of Carbonates which will improve carbonate alkalinity in soft water. It neutralizes low acid pH and reduces pH swings. It will keep the pH above 7, negating the use of quick fix short term pH buffers.