Seachem Ammonia Alert (1 year)

Get constant readings of ammonia levels in your tank

At a glance...
  • Colour changing ammonia sensor for aquariums
  • Detects Ammonia at the lowest level
  • Lasts 1 year
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Seachem Ammonia Alert is a convenient and innovative device that will stick to the side of the aquarium. Ammonia is the number 1 killer in tanks, this device can protect your fish from it before any sign of stress even at a low level cause your fish health problems and/or death. This is especially common in a new or heavily stocked fish tank. As little as 0.02 mg/L of free ammonia will produce a greenish hue on the detector surface. A sensor changes reversibly from yellow to green to blue, relative to the ammonia concentration. This unit works continuously so you can always monitor the levels within your aquarium. It is suitable for use in both fresh water and marine tanks, and it lasts over 1 year.

It's a good idea to keep a Ammonia Remover on hand too, to resolve the problem if it arises.

Key Features:

  • Colour changing sensor
  • Detects Ammonia at the lowest level
  • lasts over 1 year


No care is required beyond removing algae with clean, soft material. Avoid touching the sensor with fingers, since skin oils can damage it. Do not use bleach, soap, detergents or hard objects to clean the sensor. Simply stick to the side of the fish tank and observe the colour scale.

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