- Water change! A 30-50% water change should be the first thing you do after confirming a nitrite spike.
- Add cycled filters. As I touched on earlier, bacteria turn nitrites into much less harmful nitrates.
- Water conditioner. This is essentially a nitrite remover in a bottle.
What causes high nitrite levels in fish tank?
What causes nitrites in aquarium water to be high? Nitrites (NO2) are the result of when nitrifying bacteria process ammonia as a kind of biological filter. These nutrients are usually a sign of a cycling tank, overfeeding, overcrowding, or other poor fish aquarium maintenance.
How long does it take for nitrites to go down?
This process normally takes anywhere from 2-6 weeks. At temperatures below 70F, it takes even longer to cycle a tank.
What is the fastest way to lower nitrates in an aquarium?
Removal is simple enough if you carry out large, regular water exchange. Water changes are a sure shot, as they instantly and permanently remove the nitrate from the system. Want to remove 20 percent of the nitrate in the water? Do a 20 percent water change; it’s as straightforward as that.