This outdoor lettuce isn't part of my recirculating aquaponics system, but I occasionally fertilize it with water from the fish tank, so I'll indulge it for a post.
Mixed varieties of leaf lettuce:
A row of Black-Seeded Simpson lettuce:
An Oak Leaf lettuce plant:
Buttercrunch is my favorite. It forms a loose head that resembles a giant dark green rose (here's a better pic from an earlier post):
Here's some Outredgeous Romaine:
This is some type of red Bibb lettuce. I'm not sure what its name is, but tonight I think I'll call it dinner:
A patch along the back end of the tunnel:
And some spinach for good measure: