Marineland Black Diamond Premium Activated Carbon Filter Media, 40 oz

After years of using prepackaged charcoal bags for my aquarium I decided to try bulk charcoal and mesh bags to package my own. Works great and is much cheaper. Wish I had done this sooner.

I stopped using carbon for a while had issues with algea and nitrates. I put this in and BAM tank cleared up and algea seemed to get under control. Great stuff. A must for any aquarium

Decent amount of carbon for the price, way cheaper than filter pre-built bags with sprinkles of carbon in them. Very easy to use just dumping into a mesh bag fitting whatever needs you have and functioning the way you need it to be. Isn't dirty and just needs a simple rinse to get activated and wash off some dust

Very good value for your buck. I use it for my fish filters and to keep the air fresh in the litter box room.

I use this in my cat's litterbox to help with smell. I don't remember where I heard this tip, but it was worked really well for me. Of course, you have to be careful not to get the black dust everywhere, but that's just the nature of the product. It works well for what I need it to do!

Clears what the water in my aquarium in a few hours. Great product. Will be buying for once I run out

We work hard for the money and are happy with this move getting this carbon. The container was larger than I anticipated (22oz here). Outstanding activated carbon at a great price. I've been a fish tank caretaker for over 30 years and imho it rinses clean fairly quickly, and yes indeed you hear that rice krispies snap cackle pop sizzle coming from the carbon right after rinsing it which is a great sign of great quality. I am first using this for cat fountains with mesh zipper bags not filter material and it does not slip through the 1-layer mesh, so rocks are small but large enough it should not be an issue with say, whisper bio bags.

Works fine. Half the price of the stores.