Seachem Alerts Combo Pack (1 Year)
The Seachem Alerts Combo Pack is designed to provide continuous, real-time monitoring of crucial water parameters in an aquarium environment. Here’s how it works:
How It Works:
- Ammonia Alert: This sensor constantly monitors the levels of free ammonia in the aquarium, which is the most toxic form of ammonia for aquatic life. The sensor disc changes color in response to the ammonia concentration, allowing you to detect harmful levels before they affect your fish. The color ranges typically shift from yellow (safe) to green and blue (dangerous levels), alerting you when immediate action is needed.
- pH Alert: This sensor monitors the aquarium’s pH levels, providing a visual indication of pH changes.
| Parameter | Monitoring Range | Color Indication |
|---|---|---|
| Ammonia | 0–0.5 ppm (safe), 0.5–1.0 ppm (caution), >1.0 ppm (dangerous) | Yellow (safe), Green (caution), Blue (dangerous) |
| pH | 6.0–8.0 (optimal range) | Red (low), Yellow (neutral), Green (high) |
FAQ
How often should I replace the sensor discs in the Seachem Alerts Combo Pack?
The sensor discs should be replaced every 6 months for optimal performance, or when the color changes no longer reflect accurate readings.
Can the pH sensor detect changes in water hardness?
Please contact customer service
Is the ammonia sensor sensitive to other nitrogen compounds?
The ammonia sensor is specifically designed to detect free ammonia and is not significantly affected by nitrite or nitrate levels.

Harry Greene –
The combo pack has been very reliable for tracking ammonia and pH levels. I noticed the color changes clearly and was able to catch a spike in ammonia before it affected my fish. Easy to read and fits well in my tank setup.
Jack King –
Works well for daily monitoring. The pH disc is a bit less sensitive to small fluctuations, but overall it’s a solid tool for maintaining stable water conditions.
Carl Gibson –
I’ve used this for over six months and the sensors still show accurate readings. The visual alerts are helpful, especially when I’m not home to check the tank regularly.