Seachem Ammonia Alert

Ammonia Alert® is an innovative color-changing sensor for continuouslydetecting and monitoring toxic free ammonia. A sensor changes reversiblyfrom yellow to green to blue, relative to the ammonia concentration.No test kits, chemicals, or procedures are needed. The device detectsless than 0.05 mg/L (ppm) free ammonia and alerts you to the #1killer

before any sign of stress. It lasts over a year. This product isnot recommended for use at acid pH. Marine or freshwater use.