Looking for a quick and budget-friendly way to improve the performance of your aquarium filter? In this video, I’ll show you an easy DIY upgrade for cartridge-style filters that will save you money, increase biological filtration, and cut down on waste. I’m using the Nicrew Slim Hang-On-Back filter, which is a solid option for the price, but like many cartridge filters, the included cartridges can be frustrating. The problem? The filter floss clogs quickly, forcing you to replace cartridges far