

🟢 Stay ahead of toxic threats—your fish’s silent guardian!
Seachem Ammonia Alert is a revolutionary sensor tag that continuously monitors toxic free ammonia in both marine and freshwater aquariums. Using a color-changing sensor that shifts from yellow to green to blue, it provides instant, chemical-free readings with sensitivity below 0.05 mg/L. Designed for long-term use, it offers over a year of reliable, real-time ammonia detection, empowering aquarium managers to prevent fish stress and maintain optimal water quality effortlessly.


| ASIN | B000255R5G |
| ASIN | B000255R5G |
| Allergen Information | Yam Free |
| Best Sellers Rank | #9,895 in Pet Supplies ( See Top 100 in Pet Supplies ) #12 in Aquarium Test Kits |
| Brand Name | Seachem |
| Customer Reviews | 4.2 4.2 out of 5 stars (3,912) |
| Date First Available | June 15, 2004 |
| Global Trade Identification Number | 00000116001007 |
| Included Components | all |
| Is Discontinued By Manufacturer | No |
| Item Form | tag |
| Item Type Name | Alert badge |
| Item Weight | 0.01 Grams |
| Item model number | 10 |
| Liquid Volume | 1 Kilograms |
| Manufacturer | Seachem Laboratories, Inc. |
| Manufacturer | Seachem Laboratories, Inc. |
| Manufacturer Part Number | 10 |
| Manufacturer recommended age | 1 month and up |
| Model Number | 10 |
| Target Species | Fish |
| UPC | 798256226922 617407622898 000116001007 707005108594 |
| Unit Count | 1 Count |
T**H
Works well. Measures toxic portion of total ammonia
Works great. Measured the toxic portion (unbound) of ammonia in your tank 24/7. If it goes up, add Prime to give yourself 24-48 hours to act by temporarily neutralizing its toxicity. Couple this with an API or Salifert ammonia test to test total ammonia (toxic and nontoxic) to figure out how much ammonia you have to eliminate. Water changes, Dr Tim’s One and Done nitrobacter, etc will help you remove the ammonia from the system. Unless you overstocked, then you are cooked lol
J**E
Excellent But Misunderstood Product
I was so worried about purchasing this ammonia reader due to the amount of bad reviews. However, after doing tons of research and deciding to purchase it after all, I realized that a lot of the negative reviews were because people weren’t quite understand just exactly how the Ammonia Alert operates. It measures the amount of unionized (dangerous) levels of ammonia in the water, whereas test kits measure both the ionized (safe) and unionized (unsafe) ammonia present in the water. Therefor, the only reading you’re getting on the Ammonia Alert is that of the toxic ammonia present in your tank. This product definitely works. A few days ago, the reading on it was at the ‘Alert’ mark, which it turned a pastel green. Then, when I checked it today, it was a pastel yellow and definitely matched the ‘Safe’ zone on the wheel. Even though the color readings can be extremely subtle, they’re pretty easy to pick out when it changes. I also compared its reading with a quick test from the API ammonia test kit, to which it came back with 0 ammonia in my aquarium. Another thing I must add is that you MUST be extremely careful when you open up the product. When you remove the plastic covering for the sensor in the middle of the color wheel, do not touch the sensor with your fingers. The oils from your fingers could affect or ruin your sensor. Overall, I’m extremely pleased with this simple and cheap product. It will assure me that my fish are living well and I can take necessary action when it goes into the ‘Alert’ zone. I definitely recommend the Ammonia Alert if you’d like to monitor your aquarium’s ammonia levels while avoiding frequent water testing.
G**A
Small, sleek and reversible
Very small and useful. Also the suction cup is reversible in case you want to to hide it in back of tank but still read it. I also trimmed the excess plastic with logos off to have a more sleek look.
S**A
This thing does not work
It's extremely slow at detect ammonia presence, by the time it reads at 0.02ppm ammonia level is actually over 0.5ppm, and the only reason I discovered this is because I was skeptical, so I tested my water to find out that the ammonia level was at over 2ppm, and I immediately put in my bacteria to start the cycle. It took this thing till the following day to read 0.05ppm, so who knows how long the ammonia was present in my tank before this thing detected it. It read 0.02ppm for like 4 days before I decide to test the water my self, then an extra day after that to read 0.05ppm. Thanks to this unreliable thing my tank cycle took longer than if I had just let my tank cycle naturally. I tested the ammonia levels on my tank regularly, because I no longer trusted this thing. The ammonia in my tank was decreasing, but this thing continued to read 0.05ppm. When my ammonia levels went to 0.00ppm this thing was still reading 0.05ppm. It took it another 2 days from when I got a zero reading with the other tests kit for this thing's reading to fall to 0.02ppm. then I lost count to how many days it stayed at 0.02ppm before I just took it out of my tank and tossed it in the garbage, it must've been like 4 days. And I continued to test my water, because this thing kept making me thing the ammonia probably crept back up, sense it wouldn't go down to zero. I knew it was slow, but I thought it should eventually catch on. Seeing it not go to zero kept making me think there was probably ammonia present, and I would test, but nothing. Eventually I got fed up with it after like 4 days or so and tossed it. I don't think this thing was ever going to read zero, and by the time it directed no ammonia present, my tank would already be building ammonia, and who knows how long it would take this thing to detect it. If I would really on this thing for my ammonia readings to determine when I should do my water changes I would probably loose live stock by the time it detects toxic ammonia levels. Do not rely on this thing for water changes, and when cycling a tank, it will deceive you. Mater fact stay away from it all together, you will regret buying it if you do.
C**R
Get It - It's Worth The Investment
I've read all kinds of pro and con "opinions" on this product. It doesn't work - it doesn't match the API Ammonia Test result - and so forth. Well, in my experience it does work. And it's already alerted me to ammonia spikes in two of my aquariums - well before they became a problem. It detects free ammonia which is the most harmful form (API detects free and bound ammonia and that's why they may not agree). It lasts for a year. It reverts back to negative when the problem has been corrected. It's less expensive, much easier to use and just as reliable as other methods. I have it in all four of my aquariums. I check it daily and I no longer do ammonia tests. Do yourself a favor and get this. Oh - and read the instructions or try watching one of the available videos on how to properly use it.
S**R
Good product
Does its job, if just falls off a lot. I haven't seen any color changes either. That may or may not be because of product failure or good tank water. Either way it's nice knowing I have it.
J**N
Really liked this product for a ‘not super experienced yet’ aquascape wannabe. Feel I can check easily for the ammonia potential in the tank now and be confident to trust this little tool for keeping my tank safe and healthy.
L**L
J'étais un peu sceptique mais à tort. Je l'ai acheté pour trouver le bon rythme de renouvellement de l'eau de l'aquarium et les indications m'ont été d'une grande aide. Je ne sais pas combien de temps cette plaquette sera efficace mais moi qui suis complètement débutante avec mon simple poisson, cela m'a donné un fameuse aide au lancement. D'ici quelques mois peut-être n'aurais-je plus besoin d'en racheter, je saurai par exemple que tous les 10 jours, il est temps d'agir. En bref, cette plaquette m'a donné un peu de confiance et je remercie cette marque rien que pour cela. Et il y a bien une modification de couleur visible au fur et à mesure que les jours passent. Je recommande ce produit pour les débutant(e)s comme moi.
V**A
No encontré tiras que midan amoniaco. Este dispositivo sirve perfecto, en cuanto hay picos de amoniaco lo puedes observar.
V**E
8 am happy to have it. It is a safe guard for my little aquatic friends. Some will say it doesn't work because their drop test gives an other result. I did my researches. The drop test shows results for Ammonia and Ammonium together. Ammonium isn't toxic bu ammonia is very. The sensor of Saechem react to only Ammonia not to Ammonium. It is an important thing to know.
J**S
This product is awesome, it has stopped my obsession to need to test everyday, I’m fairly new to fish keeping 6 months in, My tank is fully cycled but the need to make sure the perimeters were perfect everyday was still there, Spending alot of money if api test, I’ve had this in my tank for 3/4 weeks and I love it, I know it’s only measured free ammonia but as that is the worst for the fish so that’s what I’m going to worry about, I water change every week anyway, What I will say I’ve noticed is during the day it will be at the safe level, once the lights are off over night it moves to the first warning alert level, On googling this is completely normal as my lights are off which stops the plants doing their thing, as soon as the lights come on it goes back to safe level, I did do a strip test after a couple of days then haven’t again highly recommend this for peace of mind,
Trustpilot
4 days ago
1 month ago