Review on 🐠 AquaClear 30 Power Filter Replacement Media for Optimal Aquarium Filtration by Amy Smith

I double the foam blocks in my AquaClear HOB filters and place ceramic rings on top. You don't need charcoal unless you're specifically using it to remove drugs or other chemicals. So if you double the foam blocks, you get a much larger biofiltration surface. I also wrapped some foam around the filter inlet. This gives you even more surface area for your beneficial bacteria. In addition, it acts as a pre-filter to keep most dirt particles and other things out of the filter compartment. This extends the life of your filter and requires less maintenance. It also prevents small shrimp from being sucked in.