Marineland Diamond Blend Carbon Ammonia Neutralizing Carbon Filter Media

By Marineland
Rated 4.75 out of 5 stars


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About This Item


  • Fast-acting special formulation is ideal for new freshwater aquariums.
  • Contains a combination of carbon and ammonia neutralizing crystals.
  • Rids water of dissolved organic waste and odors.
  • Removes toxic ammonia, chloramine and impurities for sparkling, fish-safe water.
  • Black Diamond and super-effective White Diamond clean and condition aquarium water.

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Play Video: Learn More About Marineland From Our Team of Experts
Learn More About Marineland From Our Team of Experts

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Keep your system working smoothly with Marineland filters.

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Fish TypeTropical FreshwaterMarine Fish, Tropical FreshwaterTropical FreshwaterMarine Fish, Tropical FreshwaterMarine Fish, Tropical Freshwater
Aquarium TypeFreshwaterSaltwater, FreshwaterFreshwater, PondSaltwater, FreshwaterSaltwater, Freshwater

Questions & Answers

11 Customer Questions

How do you use this for fishes? I have a 65 gallon tank.
Answer by ChewyOct 23, 2017
Use 8 tablespoons per 10 gallons of aquarium water. Place in media bag or media basket and rinse thoroughly in cold water to eliminate dust particles. Replace every 2 - 3 weeks (sooner if foul smells or water discoloration occur).

Is this a good product to use in a goldfish tank to help keep the ammonia low? Do I still use carbon in my filter systerm?
Answer by ChewyApr 07, 2018
Dual-action chemical filter media keeps pond water clean, clear and fish-safe. Marineland Diamond Blend Carbon-Ammonia Neutralizing Blend combines fast-acting Black Diamond Premium Activated Carbon and super-effective White Diamond Blend Zeolite for superior pond water quality. It effectively removes dissolved organic waste and odors as well as toxic ammonia and chloramines. For best results, fine media must be placed in a mesh bag inside of the refillable media container to avoid leakage into your aquarium system.

Can I use this in a cat litter box? To eliminate ammonia odor?
Answer by ChewyJun 13, 2023
This filter media is designed to be used in aquariums.

How much would you recommend for a Betta tank of 5 gallons?
Answer by ChewyAug 10, 2021
The manufacturer recommends 4 tablespoons for a 5-gallon aquarium.

ReviewsWrite a Review

Rated 4.75 out of 5 stars
40 Ratings
Would recommend to a friend

40 Customer Reviews

Rated 5 out of 5 stars
By Joemoe on Sep 26, 2023


Well made my cat uses this in his cat box with his litter

Rated 4 out of 5 stars
By Turtlestuff on Mar 30, 2023

Filter media

Use in all my filters, turtle, fish, and even my pond filter. Only negative is you have to put them in filter bag or filter sock.

Rated 5 out of 5 stars
By Kitty on Apr 9, 2022

Crystal clear

I only have two fish and a 20 gallon tank. However, they’re goldfish that continue to grow to be 7 inches so they put off a lot of ammonia and other kinds of water contaminants. If you were to look at my order status on Chewie you would find that I have tried 7 filter systems. I finally found a system that works for my tank. I use Whispers empty filters, and filled them with Carbon Filter Medium. I hot glue the filters closed and use them as I would other filters. I did do research On using the hot glue and found it is OK for aquariums. But if I were you, I would do research myself to find out what is safe for your aquarium. The water is amazing, I still change water every two weeks, half tank, but I think that’s because of “my paranoia“ of my fish not being able to breathe. I would recommend Carbon filter medium to anyone who is having trouble with the cleanliness of their water in their tanks. I would also recommend the Whisper empty filters to put that medium in.

Rated 5 out of 5 stars
By Denise123 on Mar 28, 2022

I use in catbox

I have used this in aquarium filter. It works real well to filter the water. I also use this in the catbox. Every time I scoop the cat box I put about 1/2 cup to 1 cup ,sprinkle over the top of the cat litter. It definitely helps absorb the smell of cat pee and poo.

Rated 5 out of 5 stars
By Bunnie on Oct 28, 2021

Add to cat litter

O M G . . . works amazing for my CAT LITTER. Bought to mix in with the clumping cat litter to help with odor. Safe for the cats and better then purchasing yucky chemicals or fragrances.

Rated 5 out of 5 stars
By Angolas on Aug 27, 2021


Triple-A purchase! Excellent quality, price and delivery; will keep our 11 big koi in crystal clear water for a year. Very, very happy that we've found Chewy.

Rated 5 out of 5 stars
By Happy on Jul 16, 2021

Help on smell dog yard

So I used everything under the sun to eliminate dog order smell in my yard. I sprinkled this down and within a hour the smell was gone. Thumbs up

Rated 3 out of 5 stars
By Peanut on Sep 21, 2021

Not sure haven't used yet.

I haven't used cause I don't have any way to test water.

Rated 5 out of 5 stars
By Motheroffuzzies on Apr 20, 2021
Top 100 Contributor

Good product for a reasonable price.

I usually use Ammo-carb, but it has been unavailable for quite some time, so I decided to try this. It seems to have a bit less charcoal than the Ammo-carb, so I added some extra till the blend looked similar to what I've been using. It seems to work as well and for a lower price.

Rated 5 out of 5 stars
By Mandy on Jan 18, 2021

Great product

I’ve had my aquarium for several years and this product really helps keep my tank clean when changing my filter media