This took me 3 weeks (most of the rock and occupants of the tank resided in my old 15 gallon prior to this)...two 16 gallon AGA bowfronts (I broke the 1st one and almost gave up). Numerous trial and error attempts with plumbing (I'm still not happy with that). And a whole lot of support from my wife (she actually squirted the water on the diamond bits when I drilled the holes). I'm pretty happy with the results. Not too sure if I'm going to keep using the 175 watt hamilton though. Just had it laying around.