does it need to go in a filter or can you just put hang it in the aquarium

Hi,I have a large external filter for my 5ft tank, so I put it inside the filter. As far as I'm aware, it's designed to be used in a filter, so that the water passes through it. I don't think that it would work as efficiently just dropped into the tank.I hope this has helped.

Can this be used in a U3 fluval internal filter or should i buy an external filter?

I have the fluval u4 filters and there is no room as these are large bags so I place it at the bottom of my aquarium and it works perfectly well

Why is this not suitible for salt water?

Because of how this works, salt causes the product to release the ammonia it absorbed (recharging it). So it won't absorb any in a marine tank. In fresh water it will work and when ammonia levels spike this can be pulled out, soaked in 5% salt solution, washed (in aquarium water) and dried. Then popped back in......if you're having to use this though...... Address the ammonia causing issue front end..... Too much food, over stocked, poor filtration.......etc. Good product but a reactive not a proactive one.

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Fluval Ammonia Remover

Product ID: 48572989

Details

Brand
Fluval
Item form
Granules
Item weight
590 g
Number of Packs
3
Unit count
540.0 gram

💧Removes toxic ammonia fast

🛒3-pack for cost-effective use

⚗️540g high-capacity granules

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181 kr

Duties & taxes included

In stock

Sold byAmazon DenmarkDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💧 Keep your fish thriving with ammonia-free perfection!

TRIPLE VALUE PACK - Economical 3-pack inserts to maintain continuous water quality without breaking the bank.
EFFORTLESS INTEGRATION - Fits seamlessly into external filters for quick, hassle-free installation.
TRUSTED BY ENTHUSIASTS - Highly rated with 4.6 stars from over 2,500 reviews—join the community of satisfied aquarium pros.
TAILORED FOR FRESHWATER - Specifically designed for freshwater tanks, ensuring optimal fish health and balance.
CRYSTAL CLEAR WATER ALWAYS - Effectively eliminates harmful ammonia to keep your freshwater aquarium pristine.

Fluval Ammonia Remover is a 540g granular treatment designed exclusively for freshwater aquariums. It rapidly removes toxic ammonia, promoting a healthy environment for well-stocked tanks. Sold in a convenient 3-pack, it fits easily into external filters and is trusted by thousands of aquarium enthusiasts worldwide.

Specifications

ASIN	B0002AQKK2
Best Sellers Rank	12,006 in Pet Supplies ( See Top 100 in Pet Supplies ) 139 in Aquarium Water Treatments
Brand	Fluval
Brand Name	Fluval
Country Of Origin	China
Customer Reviews	4.6 out of 5 stars 2,544 Reviews
Global Trade Identification Number	00015561114806
Included Components	Fluval Ammonia Remover, Chemical Filter Media for Freshwater Aquariums, 3-Pack
Item Form	Granules
Item Type Name	Ammonia Remover, 3 x 180 g
Item Weight	1.3 Pounds
Item form	Granules
Item weight	1.3 Pounds
Manufacturer	Rolf C Hagen UK Ltd
Manufacturer Part Number	A1480
Model Number	A1480
Number of Packs	3
Pet Type	Fish
Target Species	Fish
UPC	015561114806
Unit Count	540.0 gram
Unit count	540.0 gram

Reviews

X**X

Fluval Ammonia Remover: A Reliable Solution for Healthy Aquariums

It does exactly what it claims to do: effectively removes harmful ammonia from the water, maintaining a healthy and balanced environment for my fish. The installation process was straightforward, and it fits perfectly into my external filter. Since incorporating it into my aquarium setup, I've noticed a significant improvement in water quality and overall fish health. I highly recommend Fluval Ammonia Remover to any aquarium enthusiast. It's a reliable and effective solution for keeping your fish happy and healthy.

22.11.2024

G**R

Good value

A good filter media , I have mixed it with other biological media in my filters

18.12.2025

S**M

CANNOT RECOMMEND HIGHLY ENOUGH

I am a relatively new Aquarium/Tropical fish keepers. I had been struggling to control ammonia levels, despite frequent water changes and chemical additives. These work briliianly. Had them in for several weeks and the ammonia level has been at zero from day 2 and still remains at zero 4 weeks later.

2.01.2025

M**N

Swift delivery

Arrived next day. The remover does what it says and was at a fair price

14.10.2025

K**E

Deffo one to buy

After a few days i saw a significant result

15.10.2025

V**S

Works well

22.07.2025

S**A

Nice little pouches

Perfect

3.07.2025

D**T

Good product

Works well I used it for setting up my fish tank and it clear the water from ammonia lovely. I opened the bags so you can fit in to the fluval internal filter and pump. Just make sure you allway keep this product in a bag in the filter because the little bits will get everywere.

2.06.2020

C**L

My fish died when I forgot these bags. After ...

My fish died when I forgot these bags. After put them in the filter there are no fish die My aquarium have live plants now its become balance and the fish looks healthy .

1.06.2018

O**I

old

Old and the bag is open

28.07.2023

B**.

Article conforme

13.07.2021

M**K

Good Product

Superb Product must try Thank you Maple Pets

7.10.2025

K**R

Gutes Produkt

Bin zufrieden schnelle Lieferung, werde wieder bestellen.

25.02.2024

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2 months ago

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