Congrats, that's awesome!
There are a zillion-and-one mods for the AIO nanos. It's really going to depend on what you're going to do with it . The only mod I would ALWAYS recommend is getting rid of the bio-balls, foam blocks and whatever else is in the rear chambers. Some people add more
LR rubble back there, but in my experience, they trap just as much
detritus as the bio-balls. If you have sufficient
LR and LS in the display, all that other junk back there is unnecessary.
That's not to say that space is a waste, it's not. Instead, use it to house your heater, chemical filtration, a
skimmer, convert it to a
fuge, etc. There are lots of options.
Decide on what you ant to do with the tank, and we can give some ideas on what other mods might be beneficial.
