CaribSea LifeRock Arches and Shapes are made of an aragonitic base rock, instead of the typical cement used by some other artificial rock creators. Every rock contains a network of micro and macro pores that intertwine within the rock's internal structure, creating the perfect environment for natural nitrifying bacteria.

Two Little Fishies STAX Rock is a flat, porous oolitic limestone for building layered aquascapes in marine aquariums. It provides a stable structure and will not introduce pets into your aquatic environment. Use with Two Little Fishies STIX Cement to make open, gravity defying structures with lots of horizontal surfaces for attaching live corals.