The Seachem Combo Alert contains two products Ammonia Alert and PH Alert. Seachem Ammonia Alert: is an innovative colour device for continuously detecting and monitoring toxic ammonia. A sensor changes reversibly from yellow to green to blue, relative to the ammonia concentration. No test kits, chemicals, or procedures are needed. The device detects less than 0.05 mg/L (ppm) free ammonia and alerts you to the Number 1 killer before any sign of stress. It lasts over a year. Suitable for fresh and saltwater aquariums. In the absence of ammonia the unit will assume a yellow or faint yellow-green colour. 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. 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 colour 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. For emergency ammonia removal, treat with Seachem AmGuard. This product is not recommended for use at acid ph. Seachem PH Alert: The Seachem PH Alert is an innovative colour device for continuously detecting and monitoring the PH level in your aquarium. A sensor changes colour reversibly to alert you to shifts in PH levels between 5.4 and 8.0. No tests, no strips, just constant readings. No test kits, chemicals, or procedures are needed. The Seachem PH Alert lasts up to 4 times longer than competing products and is small, clear, and unobtrusive, so therefore won't detract from the view of your aquarium. Simply place Seachem PH Alert visibly anywhere in the aquarium or filter. It’s that easy. No chemicals or test procedures are required. When first put in service, response time will be about 30 minutes. Thereafter, pH shifts will register within ten minutes. Seachem sensor technology Continuously monitors ammonia and PH No tests, no strips Easy to use
