How to Lower Ammonia in an Aquarium
8GARDEN AQUARIUM GUIDE
How to Lower Ammonia in an Aquarium
Ammonia detected? Act quickly to protect your fish.
Ammonia detected? Act quickly to protect your fish. Start with the checks below, then choose only the products your tank needs.
What to do
Test the water
Check ammonia and nitrite. Watch for gasping, lethargy or red gills, but confirm with a test.
Change some water
Use temperature-matched, dechlorinated water. Retest and repeat as readings require.
Reduce waste
Pause or reduce feeding briefly, remove uneaten food and debris, and check filter flow.
Protect the biofilter
Keep filter media wet and running. Add beneficial bacteria if the tank is new or the filter was disrupted.
Helpful products at 8Garden
API Ammo-Lock
Temporary ammonia detoxifier; it does not replace water changes or cycling.
View product →
An ammonia-binding conditioner may reduce toxicity temporarily, but it does not remove the source. Continue testing and water changes; do not add new fish until ammonia and nitrite are stable at zero.