Where is the best place to get them?
I have 2 of these filers one i got missing the Impeller and the Bio-Wheels ( and the bearings)
Since I use a 350 on my 40g, when I setup my next tank I can use this to help cycle while I get my Canister set-up on it (new tank being a 55L)
then I could potentially use 2 of the 350B on my 50 Gal
when I set that up for the 2 goldfish in my kids tanks (where the kids tanks are too small)