great job so far greenjeans! since you're doing a dwc, i'd probably grab a 35% hydrogen peroxide(food grade) to keep on standby, if not for regular usage. your plants will benefit from the extra oxygen molecule and it helps with algae etc. just be careful about the measurements per gallon of water and to avoid certain ones that have stabilizing agents. lights wise, i didn't get a chance to read through your whole grow/setup but if you ever wanted to move up from cfls and keep it quiet/low cost; you could always consider some t5/t8 tube lighting. could even grab a few namebrand cree LED t8s and stick em in for a cost efficient build. good luck for the rest of your grow mate!