

Buy anything from 5,000+ international stores. One checkout price. No surprise fees. Join 2M+ shoppers on Desertcart.
Desertcart purchases this item on your behalf and handles shipping, customs, and support to Colombia.
๐ Keep your fish thriving with instant ammonia defense!
API AMMO-LOCK is a 16-ounce liquid treatment that instantly detoxifies harmful ammonia in both freshwater and saltwater aquariums by converting it into a non-toxic form. Compatible with all API Test Kits, it requires dosing every two days until ammonia is undetectable, helping maintain a safe, stress-free environment for your fish. Trusted by aquarists for nearly six decades, this product is essential for preventing ammonia-related fish fatalities and ensuring vibrant aquatic life.



















| ASIN | B000255N0A |
| Allergen Information | Apple Free |
| Best Sellers Rank | #8,052 in Pet Supplies ( See Top 100 in Pet Supplies ) #53 in Aquarium Water Treatments |
| Brand | API |
| Brand Name | API |
| Customer Reviews | 4.6 out of 5 stars 6,750 Reviews |
| Global Trade Identification Number | 00317163050453 |
| Item Form | Liquid |
| Item Type Name | Aquarium Ammonia Remover |
| Item Weight | 16 ounces |
| Liquid Volume | 16 Fluid Ounces |
| Manufacturer | Mars Fishcare |
| Manufacturer Part Number | 45E |
| Model Number | 45E |
| Number of Packs | 1 |
| Pet Type | Fish |
| Target Species | Fish |
| UPC | 317163050453 716184503656 |
| Unit Count | 1 Count |
T**O
Stops ammonia from harming fish
While it does smell a little funky, this is crucial to have especially if a filter stops working or the water suddenly becomes cloudy. This works great as a temporary solution in those situations because ammonia starts to build up in the tank fast and that can be detrimental to fish health if not taken care of in a timely manner.
A**R
Immediately does its job
Works very well
O**.
Great for goldfish
Works exceptionally well it helped my goldfish get over their ammonia disease.
C**L
Great stuff, but there is a downside I want to share
This is definitely good stuff for breaking down ammonia if you have an emergency situation and not enough time to do a water change. What people need to know about water conditioners like this for ammonia control is that if youโre using an API test kit for ammonia youโll still get a very high ammonia reading, which will be a false positive. The positive ammonia reading on your test kit is because these water conditioners bind to ammonia molecules, making them undetectable to the standard ammonia test kit. Donโt freak out, you can buy other test strips specifically for ammonia that work while using the conditioners. I use these, see photo. Funswim Ammonia Test Strips
K**R
THIS PRODUCT WORKS but it only neutralizes ammonia's effect on fish and does not reduce ammonia
I feel like the description on Amazon is misleading but once you get the product, it is very clear. If you have ammonia in your reef tank, your fish are in danger. This product gives your fish a couple of days for you to either get the ammonia down or find them a new home. I was having issues with a newer tank, and I dosed the tank with this product just to be sure everyone was safe. Well, in the morning, my royal gramma had passed away, BUT the sea horses and dottyback miraculously were still alive. I thought, oh crap, the Ammo-Lock killed the gramma (but now I'm certain the exposure to ammonia, nitrites, and phosphates were just too much for him, Ammo-Lock or not). The seahorses survive and went to a friend, but the dottyback stayed because he was doing ok. 2-1/2 days later, he was about 5 minutes from death. I realized then that the Ammo-Lock had saved him and the seahorses because I saw first hand that the Ammo-Lock had worn off just like the instructions said: it only lasts about two days . So, the dottyback got tossed into a tank with lots of coral, and he recovered within the hour. I dosed again with the Ammo-Lock when I got a bit of ammonia in that tank (it's a long story), and he's still going strong. The corals are fine, and the tank parameters didn't change a bit after dosing. This stuff really works. If you have a complete tank meltdown like I did, this will save fish lives while you figure out how to save the tank. You may still lose a fish or two, but Ammo-Lock is a hail Mary to begin with. If you're having issues with a new tank or start to see the beginnings of tank meltdown, Ammo-Lock is a must. I will ALWAYS have a bottle handy.
K**T
Nice
Works well to reduce ammonia to safer level in between water changes
J**E
๐ค
Works great you must follow directions
S**E
Surprising how well it works
I was surprised at how well this worked. My dog had bad breath so bad that it would scare children. It only took a week, but I noticed improvement.
M**N
Converts Toxic Ammonia to Safe Form โ Test Kits Still Show TAN
This product does not remove ammonia; it only converts toxic ammonia (NH3) into a non-toxic form (NH4โบ) that is safe for fish. Therefore, the total ammonia nitrogen (TAN = NH3 + NH4โบ) is not reduced. Keep in mind that standard test kits also measure TAN, not just free ammonia (NH3). As a result, test readings will not drop significantly after using this product, even though the harmful part has been neutralized. The actual removal of ammonia happens only when beneficial bacteria in the biological filter are working properly.
A**T
Made our fish healthy again
Works like a charm, made our fish healthy again as long as you use it as per instructions.
R**E
Outstanding product
I have been using many big brands for my 2 aquarium. I have a one gold fish tank with 18 gold fishes but 2 filters, one top filter and one Fluval canister filter with lots of Biomedia of Api, matrix, denitrate, purigen, etc. But sometimes the ammonia level does increase and tank starts stinking. But with this Api Ammo lock in 2 days everything is under control and the smell also goes away. I have become a fan of API brand and will always buy it. I will recommend these brands if you love your fishes: Seachem, API, ADA, Fluval and BubblesTroubles.
R**A
Good product
Good
M**S
Superb products.
Superb product. API is one of my resources for many of my aquarium essentials. Never had any problem with any of there items. Great value for money, with many products giving you size options for what you need. All products from medicated to water parameters and plant care. These products are made with an ease of understanding for what that purpose is and will help you on your fish keeping journey.
Trustpilot
2 weeks ago
2 months ago