Seachem Ammonia AlertAmmonia Alert is an innovative color device for continuously detecting and monitoring toxic free ammonia. A sensor changes reversibly from yellow to green to blue, relative to the ammonia concentration. No test kits, chemicals, or procedures are needed. Seachem sensor technology Continuously detects and monitors free ammonia No test kits, chemicals, or procedures are needed; just constant readings Lasts over a year Marine and freshwater
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