Seachem Water test Ammonia Alert

No tests, no strips. Continuously monitors free ammonia. Marine and freshwater. Ammonia Alert is an innovative color-changing sensor for detecting and monitoring toxic free ammonia. A sensor reversibly changes color from yellow to green to blue, depending on ammonia concentration. No test kits, chemicals or procedures are required. The device detects less than 0.05 mg / L (ppm) of free ammonia and alerts you before any signs of stress. One-year shelf life. Not recommended for use at acidic pH. Use in sea or fresh water.