Seachem Ammonia Alert Seachem Ammonia Alert is a continuous free ammonia monitor for freshwater and marine aquariums, using a colour-changing sensor to help alert aquarists to toxic free ammonia without test kits, chemicals, or sampling. Seachem Ammonia Alert for Continuous Free Ammonia Monitoring Ammonia Alert is designed to stay inside the aquarium or filter where it can continuously monitor toxic free ammonia. The sensor changes colour from yellow to green to blue as free ammonia increases, helping provide an easy visual warning between regular water testing or during cycling, quarantine, livestock holding, and maintenance. Free Ammonia Alert Benefits for Aquariums Continuously monitors toxic free ammonia in freshwater and marine aquariums. No test kits, chemicals, strips, or water sampling required. Colour-changing sensor provides easy visual readings. Detects low levels of free ammonia before visible livestock stress may appear. Useful for new tanks, quarantine systems, transport holding, and established aquariums. Sensor lasts about one year before replacement is typically needed. Seachem Ammonia Alert Reading Details Product type: Continuous free ammonia monitor Primary use: Toxic free ammonia detection Suitable systems: Freshwater and marine aquariums Safe reading: Less than 0.02 mg/L free ammonia Alert reading: About 0.05 mg/L free ammonia Alarm reading: About 0.2 mg/L free ammonia Toxic reading: About 0.5 mg/L free ammonia Directions for Seachem Ammonia Alert Place Ammonia Alert visibly inside the aquarium or filter. No water sample or test procedure is required. A dry sensor may have a greenish hue at first and may take up to a few days to fully equilibrate in water. Read the sensor under natural daylight or daylight-simulating light for best accuracy. Clean algae only with a soft material and avoid touching the sensor with fingers, soap, bleach, detergents, or hard objects. What's Included 1 x Seachem Ammonia Alert monitor