Please note that the same packaging is used for 4 different types of rock (ARCH, SHELF, BASE & BRANCH) and show all these types on the front of the box. 

The product you will receive is 18kg of BASE rock which is specifically boulder type pieces. 

Created from fully natural ingredients, the highest quality rock designed for marine aquariums. High aesthetics and hand-made manufacturing process, make AF Rock resemble natural rock from coral reefs. Due to the high porosity, it facilitates bacteria settlement and works perfectly as a filtration media. Unlike the rocks commonly found on the market, AF Rock was intended for efficient filtration process. The use of the best, ecological and fully safe pigments allowed to create a rock with highly decorative qualities. AF Rock does not harm the environment and unlike live rock it is free from contaminants, unwanted algae and parasites. Contrary to the live rock, the use of AF Rock is free of harmful and invasive organisms such as valonia, aiptasia, dinoflagellate, bryopsis, AEFW and undesirable crabs. The composition of the rock provides optimal conditions for the development of marine life and is completely safe for the inhabitants of the aquarium. AF Rock is an ideal medium for bacteria settlement, so it supports biochemical processes and guarantees long-term biological balance in the tank. The rock will continuously support filtration processes, stabilize parameters and facilitate the development of marine life. The rock can be cut and broken, as well as freely combined using Stone Fix. Hand-made manufacturing process of AF Rock guarantees the uniqueness of each of the sets, and also ensures the exclusive shape of each element. High porosity ensures low weight and an excellent weight to volume ratio. Due to this, AF Rock is much lighter than other rocks available on the market. The product was thoroughly tested in the laboratory, doesn’t release undesired chemicals into the water. It stabilizes the pH and KH of water, which greatly facilitates the calcification of skeletons and allows faster growth of corals, which in stable parameters build harder and healthier skeletons. It facilitates the settlement of beneficial microorganisms and significantly shortens the process of maturation of the aquarium, especially when using Bio S bacteria. It quickly covers with the desired in the aquarium coralline algae. In a freshwater aquarium, AF Rock can only be used in water with pH level above 7.0. Rinse rock in RO water before placing in tank. Due to the high porosity, the rock may break during transport, the rock fragments should be joined using Stone Fix.