Ok they can live without water but if you drown them they are dead. I had this same problem for quite a while with my Ultra Haze 2 and the only thing that I gathered, cause it wasnt over or under water I think it was because of the light and heat almost like they were getting so much light at an early age maybe that was too much I dont know. I eventually gave up on trying to figure it out and sonner than later the 1 I had a problem with corrected itself. My PS on the other hand I drowneded them on accident and they drooped very bad. Yours dont loook like that they look like the Ultra Haze 2, all I can say is keep your eye on them and I think they will be fine. Oh I had 1000w on them about 12 inches away from a 2 week olld plant of course it was an air cooled hood but thats why I think I had too much light at that stage. I hope this helps a little. 1st and 2nd pics are of the drowned Power Skunks and the last is the droopy Ultra Haze2 you ccan see the rest of the leaves are nice and perky in the background.