MarineLandBlack Diamond Premium Activated Carbon 22 Ounces, Filter Media For Aquariums

Works well

Better cost option for me, than buying prepackaged carbon filters.

Been using this carbon product for the last 20 years and both my freshwater and saltwater aquariums water is very clear. Never had an issue. I replace it about once per month but that will vary depending on how much activity you have going on in your aquarium.They also fill the carbon right up to the top of the container. So no empty space as you get a full container filled to the top which is nice!

Whenever I change the filter on my fish tank, I open the filter and add this to it before putting it in the filter, and the water in the fish tank becomes clear within a few days. Very useful.

Updated 6/8/20 - I've been meaning to go back and change my review on this for a long time. MarineLand Diamond Media Premium Activated Carbon, Blacks & Grays, 40-Ounce (PA0373) has officially gone back to being my go-to active carbon for my 160 gallon mixed reef. Ounce for ounce and ounce per dollar, short of buying in LARGE bulk from one of the dedicated online fish stores, this product has provided consistent results at the right price point. I'll take off one star for it being so dusty. It feels like I've wasted a lot of water rinsing this stuff before putting it in my tank.Per my earlier reviews, I do still occasionally find it lodged in impellers but you could reasonably argue the fact that the carbon is getting in my impellers is my fault.Since my original review, BRS has done some good videos outlining the pros and cons of the various styles of active-carbon. I'm not sure if it was BRS, but somebody also did an excellent video showing a series of tanks all being cleaned with the assorted "flavors/sizes" of carbon over a period of time. After becoming more educated on how and why active carbon works, I've tried the high end stuff, the bulk eBay pond stuff, the boutique stuff, and ultimately I always come back to the 40oz bottle of MarineLand Diamond Media Premium Activated Carbon.So, I apologize to the good people at MarineLand who make the product. It amazes me that I've been in this hobby for almost 20 years and I feel like I'm still constantly learning new things. Knowledge is power, folks. Learn on!~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~I decided to try this stuff instead of my usual product ChemiPure. I use a Phosban Reactor 550 for carbon filtration on my 125 gallon reef. A couple weeks after putting this new stuff in my reactor, I noticed that my reef octopus BH-2000 skimmer was making strange noises. I also noticed a lot of the new activated carbon floating on the surface of my tank. I discovered that the carbon was getting stuck in the finger impeller on the skimmer's pump. The image was taken 24 hours after cleaning the impeller.Also - I normally see a huge improvement in water quality 24 hours after using ChemiPure. I didn't see any improvements with this stuff.I've ordered a new batch of ChemiPure. The marineland product is going in the trash.

I love it for the price and the quantity.

I like this product because of the price and just for anybody buying in the future. Make sure after you put it in your carbon bags that you rinse it until all the black is gone. If you do not it will put carbon dust all over your aquarium and you will regret it LOL

*I love this stuff & as a pet parent keep it on hand at all times. Back in my fish keeper days it was a must have (& will be again when I get around to reviving my aquaria passion) for now I use it in my cat litter odor mix*Cat Litter Robot's friendWe use a Litter Robot & needed an extended odor additive due to the litter lasting longer than your normal pan litter. I am very happy w/ the longevity, smell, dust level, weight, clumping speed/hardness, poop odor blocking, ammonia blocking, etc of our current set up.We have 8 cats, all fixed, 2 boys & 6 girls. 2 Litter Robots (adding a 3rd next year), a tote litter box, & a short tote litter box in their isolation enclosure. W/ this setup we only have to change the litter in the Robots if one of the cats get a sick tummy or when we do a deep clean on the Litter Robot itself. The pans need a full empty maybe every 2 months.Our mixed litters - roughly 4-6 boxes every 2 months:Purina Tidy Cats Lightweight 4-in-1 Strength Clumping Cat LitterPurina Tidy Cats Lightweight Glade Extra Strength, Scented, Clumping Cat LitterOur additive mix (Literally just dump all of the below in a little tote & shake it) - one batch lasts roughly 6 months:Dr. Elsey's Ultra Litter Attractant, .56 Kg / 20 Oz (Pack May Vary)Fresh Step Cat Litter Crystals - Cat Litter Box Deodorizer Product for All Cats - Combats Cat Odors and Neutralizes Smells - Multiple Scents and Size Packs - Cat Box Deodorizer, Litter Deodorizer - 3 packUltra Pet Clumping Crystal Cat Litter, White Crystals with Multicolor Crystals, 5 LbsNature's Miracle Just for Cats Odor Destroyer (x2)Marineland White Diamond 50 Ounces, Removes Toxic Ammonia, aquarium Filter MediaMarineLand Diamond Media Premium Activated Carbon, Blacks & Grays, 40-Ounce (PA0373)