Aquarium coop also sells prefilter sponges about $4. It's what I use.Did you make the prefilter for the AC110? If not, what did you buy?
I watched the video Cory posted about doing them and there was all this modding by having to add tubing to the intakes of the AC110 to make it so the sponges would not fall off. Do you know which one you are using? Would love to just pop the sponge over the AC110 intake tube and be done. Not that I dont like the ATI set up but simpler would be even nicer.Aquarium coop also sells prefilter sponges about $4. It's what I use.
I used the medium prefilter sponges, but I have the ac70s I think tube size is the same....not entirely sure. They fit very nice. No mods on mine at all.I watched the video Cory posted about doing them and there was all this modding by having to add tubing to the intakes of the AC110 to make it so the sponges would not fall off. Do you know which one you are using? Would love to just pop the sponge over the AC110 intake tube and be done. Not that I dont like the ATI set up but simpler would be even nicer.

Getting comfortable 
apparently it’s comfortable, lol