I would love a canister but with the setup I'm looking to have this power filter seems to be the better option. I have heard nothing but good things too and know some of you guys use/have used them. I was wondering if the C-4 model would be overkill for my 36G. I figured if I numb the flow rate down it can still turn over my tank 4x/hr+. I will also use a small Hydro-Pro sponge (II model) for a prefilter on my intake. The plan is to change the filtration around a little though. I could keep their sponges but might want to use mine instead. It was going to be similar to my setup anyways: porous sponge to trap large debris, followed by dense sponge to trap small debris. Then I was looking to swop out their carbon bag and put a bag full of Seachem Matrix in the "chemical" chamber. Then in the biological trickle chamber I would just stuff it with more possibly (maybe keep the c-nodes even) and put a dense sponge of sorts before the output. I would like to try the 100ml bag of Purigen too. Where would you suggest me putting this? Could I fit it in the chamber with the Matrix?