

💧 Clear water, happy fish—denitrate your tank like a pro!
Seachem Denitrate is a high-porosity, 4mm inorganic filtration media designed for efficient anaerobic denitrification in both marine and freshwater aquariums. It removes nitrates, nitrites, ammonia, and organics without requiring special filters or cultures. Each 1-liter pack treats up to 100 gallons, supporting biological filtration and rapidly improving water quality to keep aquatic life healthy and vibrant.


| ASIN | B000255PGC |
| ASIN | B000255PGC |
| Age Range Description | all stages |
| Best Sellers Rank | #29,581 in Pet Supplies ( See Top 100 in Pet Supplies ) #317 in Aquarium Filter Accessories |
| Brand Name | Seachem |
| Color | grey |
| Customer Reviews | 4.5 4.5 out of 5 stars (1,199) |
| Date First Available | June 20, 2004 |
| Date First Available | June 20, 2004 |
| Department | Unisex-Adult |
| Department | Unisex-Adult |
| Directions | Add the denitrifying stones to filter media. |
| Included Components | all |
| Is Discontinued By Manufacturer | No |
| Item Dimensions LxWxH | 8 x 3.7 x 3.6 inches |
| Item Package Dimensions L x W x H | 7.99 x 3.7 x 3.7 inches |
| Item Weight | 1.7 Pounds |
| Item model number | 19249 |
| Item model number | 19249 |
| Manufacturer | Seachem Laboratories, Inc. |
| Manufacturer | Seachem Laboratories, Inc. |
| Material | Plastic |
| Model Name | De*nitrate 1L |
| Number of Items | 1 |
| Product Dimensions | 8 x 3.7 x 3.6 inches; 1.7 Pounds |
| Size | 1 L |
| Specific Uses for Product | Active |
| Target Audience Keyword | fish |
| Warranty Description | Warranty |
F**Y
Works Great!
Fantastic product! Eliminated the nitrites and nitrates completely within the first few days.
S**W
Works fast to take out nitrates and nitrites
I started loosing fish in my 25 gal. Fish tank...checked my water and nitrates were way too high. Bought these white covered rocks and replaced my filter rocks for these...next day, happy and living fish again!!! I l9ve this product!!
C**.
Works well
Great product, it’s lowering my nitrate levels in my marine aquarium
J**E
MAKE THIS YOUR GO TO
WITH HUGE TANKS AND HUGE CICHLIDS AND LOTS OF FILTER SYSTEMS......AND BREEDING PAIRS...the nitrites and nitrates wouldnt stay balanced.....read reviews...not to much on the one here....i was totally shocked how cheap the 1 litre is and even more shocked how quick this worked....i always buy with skepticism.....2/19/24...easy to use...make this your stand by..will buy again
A**E
Can’t hurt.
Hard to say, was about 6 weeks into a fishlrss cycle. My ammonia and nitrites were consistently at zero, but nitrates were fluctuating between 40 and 80 ppm . After 6 weeks I added denitrate to my bag of matrix. 8 weeks later n, nitrates slowly started to decrease. One week ago, did a 25 % water change followed by a 75% water change a few days later. Tested water after a day and nitrates were at zero. So not sure if the nitrate process completed its cycle in spite of the denitrate or was aided by the denitrate.
G**R
It’s actually working
I have been fighting a losing battle with the nitrates in my 75 gallon tank for over a month. I was about to lose my mind because nitrates remained around 80 ppm and I was losing fish almost daily. Last weekend I cleaned the canister filter, added half a liter of Denitrate, and did an 80% water change. I lost 3 fish in the meantime because the irreversible damage had already been done but now, a week later, my nitrates have been cut in half and the remaining fish are all acting just fine. This product has been a lifesaver! I did make the mistake of adding Denitrate directly to the baskets in my filter and some of the pieces were so light weight they were sucked up through the filter and into the aquarium, almost destroying the propeller. So I had to take the filter apart and place all the Denitrate in a media bag. However other than that, this product has performed better than expected and highly recommended.
J**N
Didn't work
I had a spike in ammonia in my salt tank so I bought this product to contr it, ammonia level went up. I did a complete water change and tested the ammonia but it was still high. Once I took this out of my filtration system ammonia level dropped to 0 in 24 hours. I love their products, this is the first time using this one and not crazy about it
K**S
Really good buy
Absolutely amazing! I'm veryyyyy new to fish keeping I have a 65 gal african cichlid tank and I've had two mass die offs and just could not figure out what I was doing wrong and why I couldn't keep my water healthy. I've been using this about 4 months now and I've not lost a single fish in the time. Ammonia nitrate and nitrites have all been perfect the hole time.
L**T
This stuff is awsome
M**A
1/4 su değişimiyle birlikte kullanıldığında 3. Günden itibaren amonyak nitrat değerleri güvenli seviyeye indi.
I**O
Buena Calidad y un excelente precio
W**N
Perfecto
C**R
Auf Anhieb bekommt das Nitral nicht aus dem Aquarium. Nach einer Woche im Außenfilter,lässt sich nur ein geringer Effekt feststellen
Trustpilot
4 days ago
3 weeks ago