pH Alert Sensor by Seachem

pH Alert Sensor by Seachem.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 to alert you shifts to in pH levels between 5.8 and 8.2. FRESHWATER ONLY. No tests, no strips, just constant readings. Freshwater Only.pH Alert Sensor by Seachem.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 to alert you shifts to in pH levels between 5.8 and 8.2. FRESHWATER ONLY. No tests, no strips, just constant readings. Freshwater Only.Product code: 2327Item No. TK-SC20