Thanks. The thing about the DWC from my eyes is it is something I could walk away from for a week or two and not worry about it. The coco I need to water/feed more or less daily. The pop bottles were an interesting experiment. I would have liked to see how much you could squeeze out of one but I planted them later in the season and they went into flower because I had them outdoors.
My first grow I tried using regular fertilizer for the plants and then found out that one of the hydroponic shops in town had the powdered nutes from General Hydroponics. I haven't bothered with pH or conductivity tests and just trusted in the overflow/water changes to take care of itself. The last month or more they have not seen above 10 C (50 F) and after tomorrow I will be doing only indoor lights. I hope they do not mind the change to warm temperatures.