Review on 🔹 EHEIM Substrat Pro 2L - High-performance Biological Filter Media (Sintered Pearl-Shaped Glass) by Julie Braaten

After watching a few YouTube videos on how to set up aquarium filters by this Brit, I looked up the biological filter media he was selling and found these. I was a little skeptical at first, but since installing it I've thought nothing of it. I'm using an Aquatop DF200 with a half crate on the last (top) canister tier. I put foam and mechanical filters on the bottom like he suggested, plastic bioballoons in the middle and these on top. I placed my old bio-ceramic tubes all the way down to allow for a slight slowdown in the water entering the filter housing. I haven't had a cleaner aquarium since then.