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
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. 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. Marine or freshwater use.
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. When first put in service, pH
Alert® response time will be about 30 minutes. Thereafter, pH shifts
will register within ten minutes. Freshwater use only.