Seachem pH Alert 6 Month Monitor
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.
Sold in Qty of: 1
Specifications
| Feature | Detail |
|---|---|
| Monitoring Range | 5.4 to 8.0 pH |
| Color Indication | Yellow to Orange to Red |
| Usage Type | Freshwater only |
| Quantity Per Pack | 1 unit |
FAQ
How long does the pH Alert sensor last?
The sensor is designed to last for up to six months under normal aquarium conditions.
Can I use pH Alert in saltwater systems?
Please contact customer service
Does the pH Alert require any power or maintenance?
No, the pH Alert is a passive sensor that requires no power or regular maintenance. Simply place it in the aquarium or filter and observe the color changes.

Michael Manning –
I’ve used the pH Alert for three months now and it’s been very reliable. The color change is clear and easy to spot. It helps me catch pH shifts early, which is great for maintaining stable water conditions in my freshwater tank.
Samantha Buckland –
The device works well and is simple to use. I placed it in the filter and can see the color shift when the pH starts to change. It’s not perfect—sometimes the transition is subtle—but overall it’s a helpful tool.
Jane MacLeod –
I was skeptical at first, but after a few weeks, I noticed the color change clearly when the pH dipped. It’s helped me adjust my water changes and avoid sudden fluctuations in my tank.