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. Freshwater use only.

• Continuously monitors pH in freshwater
• Seachem sensor technology
• No tests, no strips
• Lasts up to 4 times as long as competing products