Innovative color-coded monitoring device for continuous detection of toxic ammonia. Seachem Ammonia Alert Device alerts you to high levels of free ammonia without need for a test kit. The sensor changes color from yellow to green to blue when ammonia levels increase in your aquarium. Detects less than 0.05 mg/L free ammonia and alerts you to this #1 killer of tropical aquarium fish. Inconspicuous and attaches directly to inside glass with included suction cup. Lasts for over a year before sensor needs replacement. For fresh or saltwater aquariums.
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