The Seachem Ammonia Alert is an innovative colour device for continuously detecting and monitoring toxic 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 number 1 killer before any sign of stress. The Ammonia Alerts lasts for over a year and is suitable for both fresh and saltwater aquariums. In the absence of ammonia the unit will assume a yellow or faint yellow-green colour. It is normal for the dry sensor to have a greenish hue. It may take up to a few days for a dry sensor to equilibrate with the water. No sampling of water, chemicals, or test procedures are required. The presence of the free ammonia is detectable continuously with a response time of about 15 minutes. Response to decreasing ammonia is slower, requiring about 4 hours to go from toxic to safe on removal of ammonia. As little as 0.02 mg/L of free ammonia will produce a greenish hue on the detector surface. This corresponds to a total ammonia (both ionized and free ammonia) of 0.25 mg/L in marine water at ph 8.3. In freshwater at ph 7.0, this corresponds to 3.6 mg/L total ammonia. Free ammonia is much more toxic than ionized ammonia. As free ammonia, the alert colour corresponds to about 0.05 mg/L, alarm to about 0.2 mg/L, and toxic to about 0.5 mg/L. The alert concentration is tolerated for several days, alarm for a few days, and toxic is rapidly harmful. For emergency ammonia removal, treat with Seachem AmGuard. This product is not recommended for use at acid ph. Seachem sensor technology Continuously monitors ammonia No tests, no strips Suitable for fresh and saltwater aquariums Lasts 1 year Easy to use
