Whats wrong with my plants? Please help

[DaTrueWhiteMa]

I have some fungus gnats,never thought they can do such big damage so didnt take care of it before,but I don't have like many many of them,traps are up for 1 day and I got like 2 flies on every trap (5 total),I dont know what else can be,PLEASE HELP,dont know what can be...

 

[Antics]

For a natural solution, using sand, diotomaceous earth, or fullers earth will prevent gnats from laying eggs in your soil, and will prevent larvae from getting air. I suggest not watering for several days after adding the top layer (about 2.5cm/1" is good).

I had gnats starting around my grow a couple weeks ago, I used Fuller's Earth for about a week, and I haven't seen any gnats since.