Yes they are all white. That's why I missed it the first time around. When I went to change the water out of my bubbler bucket (which I do once a week) I noticed that there was something in the water. It looked kinda like black pepper. I took a water sample under the microscope and saw a bunch of nasty lookin wormy parasite thingies. I checked the roots more carefully and saw them in there too. They're so tiny. Took my sample down to my hyro grow shop guy to tell me what exactly these things were and he hooked me up with some gnatrol.