Easy-to-use Aquarium Ammonia Monitoring Device
Innovative color-coded monitoring device for continuous detection of toxic ammonia. Seachem Ammonia Alert Device alerts you to high levels of free ammonia without need for a test kit. The sensor changes color from yellow to green to blue when ammonia levels increase in your aquarium. Detects less than 0.05 mg/L free ammonia and alerts you to this #1 killer of tropical fish.
| Feature | Description |
|---|---|
| Ammonia Detection | Detects free ammonia levels below 0.05 mg/L |
| Color Change Indicator | Changes from yellow to green to blue as ammonia levels rise |
| Usage | Works in both fresh and saltwater aquariums |
FAQ
How accurate is the ammonia detection?
The device detects free ammonia levels below 0.05 mg/L and changes color in response to increasing concentrations, providing a visual indication of ammonia levels.
Does the device require calibration or maintenance?
No calibration is required. The sensor is designed for continuous use and does not need regular maintenance.
Can it be used in both freshwater and saltwater tanks?
Yes, the Seachem Ammonia Alert Device works in both fresh and saltwater aquariums.

Dylan Black –
This device has been a game-changer for my freshwater tank. I no longer need to buy test kits every week. The color change is clear and easy to see. I noticed ammonia spikes early and was able to adjust water changes in time. Very reliable and simple to use.
Vanessa Sharp –
Works well in my saltwater tank. The color shift from yellow to blue is noticeable when ammonia levels rise. It’s a lot easier than using liquid test kits. I still check the levels occasionally, but this gives me peace of mind.
Benjamin McGrath –
I’ve had this for three months and it’s still functioning perfectly. The sensor is durable and the color indicators are very clear. I use it daily and it helps me maintain stable water conditions.