LittleRox are pressure washed, natural oolitic limestone rocks from Florida. They can be used to create rubble zone on the bottom in the freshwater cichlid tanks or in the marine reef aquariums. LittleRox are also ideal bases for attaching coral frags, zoanthids, and corallimorphs. They have numerous surfaces for points of attachment, and provide a more natural-looking base than typical frag plugs.