Seachem Ammonia Alert

Seachem Ammonia Alert is a continuous colour-monitoring sensor for detecting toxic free ammonia in freshwater and marine aquariums. Designed for fishkeepers who want an always-visible ammonia indicator without routine water sampling, strips, chemicals or test procedures, this compact Seachem aquarium ammonia monitor changes colour according to free ammonia levels.

Key Benefits

• Continuously detects and monitors toxic free ammonia in marine and freshwater aquariums.
• Reversible sensor changes from yellow to green to blue in response to ammonia concentration.
• Detects free ammonia below 0.05 mg/L (ppm).
• Provides a visible response in about 15 minutes when ammonia is present.
• Lasts for over a year.
• Small, clear and unobtrusive design for an aquarium display.

How to Use

• Place the sensor in the aquarium and read its colour under natural daylight or daylight-simulating light for maximum sensitivity.
• A yellow or faint yellow-green colour indicates the absence of free ammonia. A dry sensor may naturally appear greenish and can take a few days to equilibrate in aquarium water.
• As ammonia decreases, the response is slower and may take about 4 hours to change from TOXIC to SAFE after ammonia is removed.

Suitable For

• Freshwater aquariums.
• Marine aquariums.
• Not recommended for aquariums with acidic pH.

Specifications

• Greenish detector colour may appear from as little as 0.02 mg/L free ammonia.
• ALERT corresponds to about 0.05 mg/L free ammonia; ALARM to about 0.2 mg/L; and TOXIC to about 0.5 mg/L.
• In marine water at pH 8.3, 0.02 mg/L free ammonia corresponds to 0.25 mg/L total ammonia.
• In freshwater at pH 7.0, 0.02 mg/L free ammonia corresponds to 3.6 mg/L total ammonia.

What's Included

• Seachem Ammonia Alert continuous free-ammonia sensor.

Frequently Asked Questions

Does Seachem Ammonia Alert work in freshwater and marine tanks?
Yes. It is designed for continuous free-ammonia monitoring in both freshwater and marine aquariums.

Do I need to add chemicals or take a water sample?
No. The sensor provides a continuous colour indication without water sampling, chemicals, test strips or test procedures.

How quickly does the sensor respond to ammonia?
The presence of free ammonia is detectable continuously, with a response time of about 15 minutes. A reduction in ammonia may take about 4 hours to change from TOXIC to SAFE.

What do the sensor colours mean?
Yellow or faint yellow-green indicates no free ammonia. Green and blue indicate increasing ammonia, with ALERT at about 0.05 mg/L, ALARM at about 0.2 mg/L and TOXIC at about 0.5 mg/L free ammonia.

How should I clean the Ammonia Alert sensor?
Remove algae only with a clean, soft material. Do not touch the sensor with your fingers, and do not use bleach, soap, detergents or hard objects.

Can aquarium medication affect the sensor?
Some dye medications may discolour the sensor. Red-enhancing aquarium lighting can also reduce the apparent green and blue colour response.