Maxspect Nano-Tech Anaerobic Blocks | Aquarium Filter Media For Nitrate Removal Pack Of 2 Block

Ultra-high Surface Area

Completes the nitrogen cycle through denitrification, by culturing anaerobic heterotrophic bacteria (including species of the genera Paracoccus denitrificans and various pseudomonads), reducing nitrate into nitrogen gas.

Use directly in sump, stack up two Anaerobic-Blocks horizontally, and place a Denitrification Catalyst in between the blocks, as illustrated above. The Denitrification Catalyst will be slowly used up and should be replaced every 2 months.

The Anaerobic-Block should be cleaned or replaced every 6 months for optimal results, however when cleaning/replacing old Anaerobic-Block, DO NOT replace all of them at the same time. Clean/replace half of the Anaerobic-Block such that there are sufficient bacterial colonies remain to reestablish themselves in the newly cleaned/replaced Anaerobic-Block.