Seachem Ammonia Alert

-Ammonia Alert® is an innovative color device for continuously detecting and monitoring toxic free ammonia.
-A sensor changes reversibly from yellow to green to blue, relative to the ammonia concentration.
-No test kits, chemicals, or procedures are needed.
-The device detects less than 0.05 mg/L (ppm) free ammonia and alerts you to the #1 killer before any sign of stress.
-It lasts over a year.
-This product is not recommended for use at acid pH.
-Marine or freshwater use.