Review on Marineland Black Diamond Premium Activated Carbon: Top-Quality Filter Media for Aquariums in Blacks & Grays (10 Ounces) by Ashley Gauthier

I used to buy this stuff, they switched it to regular charcoal. it is not processed properly. You can flush and flush and every time you just end up with a black messy mess. The grains are small and they continue to dissolve as I rinse them. rinsed in cold and hot water, rinsed with and without a spray bottle. black mess all the time. It turns my hands black. complete scrap. do not buy. Most of the reviews here are from people who use it for other reasons. You should not comment on aquarium products.