You have a lot of equipment. I'd work with the 400s for now, since the heat demands are far, far less.
Yes, those purple plants were from clones. The funny thing is I didn't mean to clone them. I had decided to not grow them again (bagseed schwag; I couldn't make it good nohow) but somehow I took cuttings anyway cause I got my moms mixed up. Stoner, lol. The reason they got so big is I didn't have room to flower them and they were vegging with some other stuff that I didn't want to flower so I couldn't just flip them so I waited and they got too big.
Anyway, if you are interested in hydro, I recommend flood and drain for starters. It's much easier than dwc and more likely to lead to success for a beginner. The turbogardens I use are cheap ($220) with pumps and pots and rocks. One of those under a 400W light will provide abundant buds.