thanks man! yea I went head first into my first one too lmao... but I'm by no means a expert.... but with my system I didn't start to add nutes unitl about 2 weeks after sprout... a rough estimate... size doesn't matter in the stage your in at the moment. all you should worry about for the first couple weeks is too much stretching to where they cant support themselves... through my journal.. they stayed small until about 2 weeks into flower... then they started growing bout 2 inches a day... it was crazy!! but I guess what I'm trying to say is that all you really need is PH'd water, higher humidity, and low light for the seedling stage.... patience is key.. in this stage all you really need to do is make sure they aren't completely dry (but also not too wet).. and let them do their thing... its literally the hardest thing to do..... but if you can do it you will be glad you did.. lol