Yeah exactly what SMP said. Im currently in my first hydro grow, done soil a bunch of times prior like yourself. I use RR plugs to germinate, then I use those grow through pots(roots grow through them) you can buy at home depot or lowes that are maybe 3-4" in diameter to start them before I transplant into my system. Once you transplant into your system, you will need to hand water for a while. 4-5 times a day. But once the roots start to find themselves down to the water, you will be good to go. It is imperative you hand water though! I think I had to do that for 4 days.