So a good while back, I started learning about growing hydroponic lettuce. It's a great way to have lettuce year 'round, and living in Oklahoma, the heat is just blazing hot in the summer which affects lettuce grown outdoors. For a few cents and some time, I started doing it indoors. These are my results of the first grow. Hopefully, I'll have more to post in the near future.
I make my own fertilizer with 10g of Masterblend (tomato food), 10g of CalNit, and 5g Epsom salt...all mixed in a 5 gallon bucket of water. PH is around 6'ish.