The pH Alert device is a unique tool placed in the aquarium or filter to continuously monitor pH levels. The sensor changes color inversely from yellow to orange to red, alerting you to changes in pH levels between 5.4 and 8.0. For use in freshwater only.

Key features:

• Continuously monitors pH levels in freshwater
• Seachem sensor technology
• No tests needed, no strips
• Lasts up to 4 times longer than competing products