Review on 🐠 Acurel Activated Carbon Granules - Premium Filter for Aquariums and Ponds by Marcia Estrella

I gave this filter a B because when I opened the box it had a bit of charred grass inside which makes me wonder what wood or process it was made from it was made. I'm a little nervous about using it given my find and also the lack of a seal on this jar. I like the feel of it, just need a little more security when installing something like this in a very expensive and fragile aquarium (nature aquarium).