Seachem De Nitrate
de*nitrate removes nitrates, nitrites, ammonia, and organics from both fresh and marine water. The high porosity of de*nitrate supports the proliferation of both aerobic and anaerobic bacteria that further remove these toxic aquarium byproducts. Even when exhausted as an organic adsorbent, de*nitrate continues to be an excellent support for the biological filter and does not have to be removed.

Use in a low flow area of your aquarium.  You can use it either within the filter box of an external filter, a separate media reactor or an internal filter. The internal filter must, however, have a low flow of under 200 litres per hour.

Sizes available: 250ml and 500ml