Fluval G3/G6 owners

[troyd75826]

I have a G6 in an overstocked 65 gal goldfish tank (7 two-three inch fancies). I just replaced the carbon cartridge with a cartridge filled with about 350 cc of purigen. I simply filled the cartridge with the media. I did not use a bag to hold the media. When I rinsed the cartridge with the fresh purigen, I did not see any significant loss of media through the cartridge.

Opinions please. Do I really need the Seachem media bag? Anything thing else I should be considering?