Overall, the system seems to have jumped up a gear. The fish seem well and are feeling strongly. The plants have taken a torn towards looking better.
Another good sign, the 6 lettuces I sowed 4 days ago have all sprouted. (although you have to look close to see them all).
With the system more balanced, and with the addition of a fan, I’m hoping these sprouts start off with better stems.
Last note to self: to have a more substantial source of vegetables, I need to figure out a sowing schedule so that I’m constantly growing more plants to replace one’s I hope to one day harvest.