HydorActivated Carbon Salt Water Professional External Canister Filter Media – Low Ash Content for Saltwater Aquariums – Produces Crystal Clear Water – Includes Mesh Bag – 400 GM Pouch, Black (D02200)

This is carbon, you really cant give carbon a bad review if you use it right. My issue is that it wont fit in my canister filter although this is the carbon packs made for my filter. They're just too full.

They hit the nail right on the head with this one.It comes in a mesh bag that you can then use on your canister filter or hang on back filter.The item was everything i expected and was able to put it to use right away.

Wonderful! I use this in my Hydor 350 in one of the baskets and my water is awesome. I lie to overdo the Hydor filter (350 on a 30 gallon tank) , replace the filter every month, change the water every month.Very please with how the water looks crystal clear!

Awful stuff which filled my sump full of black powder when I tried to fluidise it.

Very good

Ottimo cabine attivo per acquari Marini

I was looking for charcoal to use in my kiln that didn't cost an arm and a leg. This fit the bill

perfetto