Penguin 150 w/ BioWheel Filter
My Penguin 150 filter comes with 2 slots for filter media......needless to say, I have a filter cartridge in one of them now. Was kind of wondering if it would be beneficial to insert one in that second slot, as well? Thought maybe it might not disturb the bacteria balance as much when I have to change cartridges if I can alternate them.
Any thoughts, suggestions??