Review on 🔧 Optimized Bio-Wheel Assembly for Marineland Eclipse PRO and PFE3 Filter Parts in Aquariums by Kristen Lopez

This item does not need to be replaced but I bought this as a replacement as the old one was second hand. However, I've since read various articles that these bio wheels don't actually work. While the idea is good, the product itself often doesn't provide a good home for beneficial bacteria because of such a small surface area being exposed. I don't quite get it, but I don't have a huge problem with it rotating in the hood of my tank.