Aquaroche ceramic rocks develop into a huge biological filter within a very short time due to the 'Live Rock' (LV) function. The coarse texture of the ceramic rocks allows solid stacking to build a natural decor with many caves and hiding places. Ceramic rocks are indistinguishable from natural live rock after only a few months and are biologically superior and pH neutral.They can all be used in Freshwater and Seawater aquariums, however the following are specifically designed for Freshwater aquariums.