Maxspect Nano Tech ANAEROBIC Block 2 PCS X Filter Sump Aquarium Sweet Marine NITRATE REMOVAL

MAXSPECT NANO TECH ANAEROBIC BLOCK 2 PCS X FILTER SUMP AQUARIUM SWEET MARINE REMOVAL NITRATES Effectively removes nitrates. Technology designed to stimulate the growth of anaerobic bacteria. Anaerobic bacteria complete the nitrification cycle that breaks down nitrates into nitrogen gas by exporting the organic charge from the aquarium. For freshwater and marine aquariums. 2 blocks treat 2000L of water The package contains 2 blocks + denitrification catalyst (to be replaced periodically - replacement available in our listings). Size: 97*97*25mm each block