The Seachem Ammonia Alert is an innovative color-indicating device that provides continuous detection and monitoring of toxic free ammonia in your aquarium. This sensor offers an essential early warning system, eliminating the need to wait for signs of stress or death in your fish or corals before taking action against a dangerous ammonia spike. It allows you to see at a glance if trouble is brewing, giving you precious time to perform water changes or dose additives to bring levels back into a safe range before any harm is done.

This device features advanced Seachem sensor technology that requires no test kits, chemicals, or complex procedures to use. The small, clear, and unobtrusive sensor can be placed directly in your display tank or sump without detracting from your aquascape. The indicator changes color reversibly from yellow to green to blue relative to the ammonia concentration, detecting as little as 0.05 mg/L of free ammonia. Designed for both marine and freshwater use, this simple and effective monitoring tool lasts for over a year, providing long-term peace of mind.

This product is indispensable for any aquarist, from beginners cycling a new tank to seasoned hobbyists managing a heavily stocked system. It is particularly valuable for situations where ammonia spikes are most likely, such as after adding new livestock or experiencing a filter malfunction. By offering a constant visual cue to the number one killer of aquarium inhabitants, the Ammonia Alert empowers you to take preventative measures, protecting your aquatic life and your investment without the hassle of frequent manual testing.