Nitrate reducing bio filter. Nitrate is the final product of the nitrogen cycle. Tap water often contains large amounts of nitrate. If it is not regularly removed by frequent water changes with nitrate-free water, it will enrich and then promote algae growth.
The Sera Bio-Denitrator biologically removes nitrate from the water. It provides surface area for nitrate-reducing bacteria and products up to 36 litres of nitrate-free water per day.
