Review on Optimized Marineland Diamond Blend 23oz: Ammonia-Neutralizing Zeolite and Carbon Aquarium Filter Media by Russell Robertson

I use this for the top of our tray which is low like a flower box. The tray originally came with artificial grass to be placed in front of the leaves but I have a cat that will eat EVERYTHING, paper, plastic or fiber so I decided not to use grass and was originally looking for one Aquarium gravel, but then I found it! It's amazing to keep the smell of trash under control. I used maybe 1/5 of a container and it's been in for a month and still works great. I think once it stops working I'll just throw it away and replace it from time to time as I have plenty left.