CaribSea LifeRock (20 lb) – An eco-friendly artificial live rock alternative for saltwater aquariums, supplied in a 20 lb mix of shapes. Each LifeRock piece is crafted from natural porous rock infused with spored bacteria and coated in realistic purple coralline algae coloration. This allows aquarists to establish instant biological filtration and cycle new tanks faster. Perfect for marine or reef aquascaping, LifeRock is safe for all fish and invertebrates and enables creative rock structures that are pest-free and full of visual appeal from day one.