Last time I tried to give opinions on this forum I got clowned on by a mod for being ghetto and said I'd never be back, but a year later here I am, bored....

That's more than enough air man, you don't even need the stones, or get all fancy with the setup unless you want to. Just plain ol' non-recirc dwc will do a fine job of it.... as long as the water's rolling nicely surface diffusion will give you all the DO you need. A bare line fixed at the bottom of the rez will serve fine, with no chance of clogging up or breaking, and you save a trip to the store and a few pennies on buying them in the first place.

I've had power outages of well over 24 hours in a dwc, they will start to droop but as soon as the water is adequately agitated they'll perk up quick.

just remember as with most things, complicated isn't necessarily better.