dried burnt yellow brown

Hi, I'm on week 7 from seed and my plants don't look happy. They are clearly stressed. The different information on the internet has left me more confused than when I was just guessing alone. Can anyone help? 4'x4' indoor grow space (can expand) 7 plants (1 Super Lemon Haze and the other 6...

My ph meter was wracked out. Can I fix these girls. Will they still grow. Tri's are still clear but some of the hairs are turning brown