Looks like no cal mag plus from the red stem. PH might of held you back but not much. Seedlings do not need nutes for two week and then 1/4 nutes. If you don't have cal mag you can use a little epson salt to help.


Loc Nar, was talking bout 2 weeks from your first post when to add nutes( seems like your just over two weeks and 1/2 strenght might be to much). Flush with water only and make sure you have plenty of light. Im no expert but what ive learned is start with the proven feeding schedules(when all variables permit) Good Luck, post more pics if you get time