Does anybody use filter floss in a refillable media cartridge for a Penguin? I wanted to see if it is less prone to clogging and if it is easier to rinse clean. The Marineland cartridges tend to clog too quickly for my liking. Also, is there a big money savings switching from carbon to Purigen? I know it may seem like a silly question, but I just wanted some feedback. I know Purigen lasts much longer.