Here are some pics of my fishroom air supply setup.
Jehmco LPH60 air pump in closet. I used 3/4" PVC around the perimeter of the room to form a continuous loop.
Left side of double 4 foot rack for six 33L breeder tanks. I installed six air valves per tank in case I decided to add additional filters or other air operated devices but I'm only using 2 air valves for the HMF filter uplift tubes.
Close up of the center of the above rack. It shows the drain setup for the drilled overflows for the tanks on the shelf above. I still haven't installed the automatic drip system.
I currently have six 33L tanks, six 30 breeder tanks (36"L), one 30B tank (30"L) and one 20L. My last rack isn't done yet because I can't find any more 30"L 30B's to finish it. I'll probably just use four more 20L's if I can't find what I want.
Sorry for the delay in posting pics, it seems I forgot to take pictures of the room after I added tanks.