This is an odd question. I got my aquarium 6/13/12 off of craigslist. It's beautiful !! The , fella was showin me how everything worked (the filter and heater). And when I got it home, I put in a new filter cartridge, it's a Marineland size E that fits in the Bio-wheel Emperor 280. The tank also came with a plastic grey thing that opens up. It fits into the filter, but, I am confused about does the filter cartridge fit inside this plastic grey thing ??
I have actually tried to put the cartridge into the grey plastic thing, but it doesn't close/snap shut. Please HELP !!!
Thanks in advance !!