When Things Don't Go Quite Smoothly

After the original "batch" of seeds I started failed to grow, I replanted new seeds. After Two weeks, Those failed to grow like I have seen other lettuces grow. Immediately upon seeing this, I installed a small grow light: I suspected they were not getting enough light.

Fortunately, the plants seem to be in better shape now. As well as changing lighting, I will begin to "feed" the plants a very low dose of nutrient solution. Since lettuce does not require much  nutrition (relative to other plants), I will only use a low-dose. However, prior to that, I will transfer the plants into netted-cups with hydroton. Once the root structure begins to develop, I will put the cups into the PVC pipes.