Is this spacing appropriate for a DWC (maybe a DWC) lettuce setup? I'm using 2" pots and packing them about 9 per sqft. My outdoor square foot garden did 12 per sqft, but I figured I'd give a bit more room since this will likely be grown under lamps so the lighting is less favorable.
I've got 2 cheap 10" air stones inside and a variable air pump that advertises being good for up to an 80 gallon tank (I figured I could dial it down for lower wear/noise).
I have an old pond pump too, so I may shift to recirculating later, if for no reason other than benefitting from a larger overall reservoir volume. (The container is going to get painted to block light. The other cups are still printing, so add 5 more under the same spacing.)