Review on 🐠 Seachem Matrix: Ultra-Effective Aquarium Filter Media, 4 L / 1 gal. by Julie Howard

I can only give 4 stars. I'm a bit of a snob when it comes to biomedia. I really believe in this brand. I only use this and Biohome Ultimate. While Matrix seems to work very well for me, this product lacks consistency. In this container I had everything from ordinary rocks to what appeared to be volcanic glass. Unfortunately, that's just not normal. A person like me could easily buy pumice stone in bulk. We can easily break them down by size etc, so Seachem has to provide us with a full quality control service before packing these items.