Ammonia Alert lasts 1 Year for Freshwater and Marine.
pH Alert lasts 3-6 months for Freshwater Only.
The Alert Combo? pack combines Ammonia Alert? (1 card) and pH Alert? (1 card). Ammonia Alert? and pH Alert? are almost half the size of competing products. At 1.5" x 2.5", they are small, clear, and unobtrusive, so they won't detract from the view of your aquarium.
Simply place Ammonia Alert? and pH Alert? visibly anywhere in the aquarium or filter. It?s that easy. No chemicals or test procedures are required.
Ammonia Alert's? sensor changes reversibly from yellow to green to blue, relative to the ammonia concentration. It detects less than 0.05 mg/L (ppm) free ammonia and alerts you to the #1 killer before any sign of stress.
pH Alert? is a unique color device designed to be placed in the aquarium or filter and monitor pH continuously. A sensor changes color reversibly from yellow to orange to red alerting you to shifts in pH levels between 5.4 and 8.0.
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