Great setup so far! I really want to do something similar when I move.
One suggestion if you're going for sponge filters as your sole source of filtration is to always use two (or more!) per tank, so you can clean one at a time and not worry about disrupting a cycle. Also, if one gets disconnected for some reason you will have a back up.
I am. I am running 2 - Hydro Pro 3's per tank. There will be one breeding group per tank. 4-6 fish total.







