In the absence of free ammonia the unit will assume a yellow or faint yellow-green color. 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.
Why Its Different
Ammonia Alert™ lasts over 9 times as long as competing products (over a year compared to 4-6 weeks). Ammonia Alert™ is also almost half the size of competing products. It's small clear and unobtrusive so it won't detract from the view of your aquarium. Interpretation 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 color 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. This product is not recommended for use at acid pH.