Seachem Alert Combo Pack 6 Month Ammonia & pH

No strips, no tests, just constant readings. The Ammonia Alert and pH Alert come together in one convenient package. The Seachem Alert Combo Pack – (6 Months) uses Sensor Technology in which a dedicated sensor changes color reversibly to alert you to even the smallest shifts in ammonia and pH levels. Just place the sensor cards inside of the aquarium. It’s that easy! No chemicals or test procedures are required to get accurate readings every time. pH Alert lasts 3-6 months and is suitable for freshwater use only. Ammonia Alert lasts 1 year and is suitable for freshwater and saltwater applications.