pH Alert® is a unique color device designed to assist in the militarization of the ph in a freshwater aquarium or filter. A sensor changes color reversibly to alert you shifts to in pH levels between 5.4 and 8.0. The pH Alert last up to 4 times as long as other similar products. It's small, clear, and unobtrusive, so it won't detract from the view of your aquarium.
Simply place it anywhere in the aquarium or filter and you will be able constantly to monitor the pH levels.
When placed for first time in the aquarium it may take about 30 minutes for response. Thereafter, pH shifts will register within ten minutes.
*Avoid touching the sensor with fingers, since skin oils can damage it. Do not use bleach, soap, detergents or hard objects to clean the sensor. Some dye medications may discolor the sensor. For maximum sensitivity, the unit should be read under natural daylight or daylight simulating light.