Rheann, I imagine the media basket will be bigger in the 75 gal one, but I had to modify my filter order. I put the biological 'rings' they send in the bottom of the filter itself, below the basket. Then the coarse then fine filter pads, and the charcoal on top. This is definately not what they recommend, but the basket's pretty small. Also, they send a bag of charcoal that doesn't last long, but there's no way to refill it. So I took a pair of pantyhose and put charcoal in them and tied it off. Works great!