~fvk~
the Lion is going Guerrilla...
Ran into the same problems when I first started out in coco with seedlings... Overwatering caused P deficiency and continuing to baby them just poured salt in the wounds. Seedling roots take a lot longer to spike out than clone roots and a lot of people baby their seedlings too much. In my experience, you have to let seedlings somewhat dry out a couple times to keep them healthy... Once they start to catch on, they'll start exploding... That and use smaller containers, I cut beer cups in half for seedlings and clones and other people just use straight up beer cups. Those 2 liters are way too big for the size of your plants...