Natural Lava Rock Filter Media Bag Split – Repacked This natural lava rock filter media provides outstanding biological filtration thanks to its highly porous structure. The coarse surface offers an excellent environment for beneficial bacteria, helping to maintain healthy water quality in aquariums, ponds and filtration systems. It can also be used as an economical aquarium substrate, either as a complete base layer or to increase substrate depth beneath decorative gravels and rocks. Key Features Natural porous lava rock filter media. Excellent biological filtration performance. Large surface area for beneficial bacteria. Ideal for aquarium and pond filtration systems. Suitable as aquarium substrate or substrate base. Can be used beneath decorative gravel and rockwork. Suitable For External aquarium filters Sump filtration systems Pond filters Freshwater aquariums Marine aquariums Substrate base layers Please Note This is a natural product. Rock colour varies naturally between black, dark brown and reddish brown. We recommend rinsing thoroughly before use. Condition Bag Split – Repacked. Contents are unused and have been transferred into secure packaging due to damage to the original bag.
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