Penguin 330 Bio-Wheel

[BadKarma99-4spd]

with the penguins do you have to constantly buy filter cartriges? i plan on getting the ehiem, which is about twice as much for my 55gal us, and from what i have read the eheim dosent need these cartriges making it somewhat cheaper in the long run?

can anyone confirm or deny this? please educate me
thanks

 

[FanOFish]

Well, I buy the four packs of filter for my Emperor filter which cost me about $10 but will last a year.

I have heard of people taking the cartriges out altogether and just filling the canister with that white poly stuff.