by the pics it looks like the plant is really lite green. maybe your ph is locked up cuz you shouldn't really have to be using nutes at this point. hhhmmmmm, i donno but it should be a lot darker. what light do you have? Maybe it is too close? Something don't look right and it should def. be growing a lot faster. Don't waste your time, start over if you want, seedlings grow really fast at the start, if you don't notice vigorus growth something is going wrong for ya buddy.