Natural color highly porous filter media is a much more effective and durable media than other media products currently on the market. Live rock substitute-popular among reef hobbyists as a substitute for live rock because it reduces nitrates more efficiently without harming the environment. Perfect for use in sumps or stacked in large aquarium filters. Due to its highly porous surface the media has a much higher surface area than other filter media's. This allows you to keep higher fish loads or have a smaller filtration foot print whilst at the same time reducing tank maintenance.

Very effective at breaking up impure substances therefore making aquatic fish and plants much more healthier, as well as removing and disintegrating harmful NO2 / NO3 (Nitrate / Nitrite) very quickly.

Features Much more environmentally friendly than using live rock that has been harvested out of the ocean It will not introduce pests (like Aiptasia, Majano’s or predatory crabs) into your tank like live rock potentially would High water retention preserves beneficial bacteria for longer Blocks are ideally suited for large setups Add to existing tank set ups for additional filtration, simply set the block down in your sump Better value due to higher performance Reduced tank maintenance Allows for higher fish loads Can use a smaller filtration footprint More consistent water chemistry Chemically inert Suitable for internal or external filtration systems Can be used in Freshwater Tanks and Fish Ponds Dimensions:13 x 8 x 3cm Guidelines for Use Before use: rinse filter media through until the water runs clear. Best to use in the back or the bottom of water entry in the filtration area.

This filter media has a life span of 12 months