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Seachem One Year Combo Alert

Seachem One Year Combo Alert - Main image
$10.23 $15.99 In stock

Category: Aquarium Water Test

Seachem One Year Alert Combo


pH & Ammonia Alert Advantage Pack for one year.


pH Alert

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

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 5.4 and 8.0. No tests, no strips, just constant readings. Freshwater Only.

pH Alert® lasts up to 4 times as long as competing products. pH Alert® is also almost half the size of competing products (1.5" x 2.5"). It's small, clear, and unobtrusive, so it won't detract from the view of your aquarium.

Ammonia Alert

Ammonia Alert is an innovative color device for continuously detecting and monitoring toxic free ammonia. A sensor changes reversibly from yellow to green to blue, relative to the ammonia concentration. No test kits, chemicals, or procedures are needed. The device detects less than 0.05 mg/L (ppm) free ammonia and alerts you to the #1 killer before any sign of stress. It lasts over a year. Marine or freshwater use.

In the absence of free ammonia the unit will assume a yellow or faint yellow-green color. It is normal for the dry sensor to have a greenish hue. It may take up to a few days for a dry sensor to equilibrate with the water. No sampling of water, chemicals, or test procedures are required. The presence of the free ammonia is detectable continuously with a response time of about 15 minutes. Response to decreasing ammonia is slower, requiring about 4 hours to go from TOXIC to SAFE on removal of ammonia.

Ammonia Alert® lasts over 9 times as long as competing products (over a year compared to 4-6 weeks). Ammonia Alert® is also almost half the size of competing products (1.5" x 2.5"). It's small, clear, and unobtrusive, so it won't detract from the view of your aquarium.

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Customer Reviews (4.8 / 5 · 4 reviews)

Brian ★★★★★

I love how the pH and ammonia sensors just sit in the tank and change color without any messy test tubes. The claim that they last up to four times as long compared to traditional strips is exactly what I needed for my busy schedule.

Thomas ★★★★★

These sensors have been sitting in my tank for six months now and I've completely stopped guessing about water quality. The ammonia alert is the one I check every morning, and it's reassuring that it'll keep working for another year without needing replacement.

George Y. ★★★★★

I was skeptical about sensor-based monitoring, but the pH Alert has been sitting in my tank for two months now and hasn't drifted once, which beats any test kit I've used. Set it and forget it, and the pack lasting a full year is a solid deal.