Seachem Ammonia Alert Sensor.
Suction cup the ammonia alert into your fresh or saltwater aquarium and read the color dot to determine the ammonia level at any time.
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Perfect Item Review by James
Everybody needs one of these in their tanks. I used mine to monitor my cycle and I'm still using it. I've checked the accuracy twice with chemical testing and it's been spot on. Zero Ammonia. I still do regular testing but this will give me a heads up in case something starts to go wrong between tests. Awesome product! (Posted on 9/20/2014)
- Perfect Item Review by James