Droopy and yellowish leaves.....a few brown spots HELPPPP(PICS)

Okay so this is my first grow, Im using a 4v4 tent with a 600watt mh with 9 plants. Theyre potted in 70% black gold organic, 20% cooc, and 10% perlite. Theyre 2 weeks old. In the past 4 days the leaves have began to look very light in color almost yellowish, pretty droopy, and a few are developing brown spots. What could be causing this problem?! Ive spotted a few gnats in the soil so Im going to pick up some mosquito dunks to kill them off but does this explain the yellowing and brown spots, or this a nitrogen/phosphorus deficiency. Theyre only 2 weeks old and no nutes have been added. The soil has earthworm castings in it but thats about it. What do you gys think the problem is here? overwatering? I havent watered in 3 days the soil is basically bone dry but i was watering every 2 days before that. Could it be the gnat larvae? or a nute deficiency?

Any hep would be appreciated so i can save my babies I am torn. If it s a nute deficiency would dyno gro 9-3-6 be my best bet?!?!

First two pics are from today

The next two are from sunday

Looking worse :/

too much light for babies thats my guess.....raise the light really high or buy florescents for babies. also there is a new product on the market called "Optic foliar Over grow" it works wonders and will most likely fix your babies...you can foliar spray with the lights on as well as it leaves no residue. i bought mine at monstergardens.com

If you keep the 600 far away should be fine, are you using tap or RO water? And are you checking ph?

Ive been using distilled water....is RO, reverse osmosis? and yes ive been checking PH its been on the acidic side, rougly 6.0 I'd say. I had a dolomite solution to try and fix it but I havent watered and checked it since. Ill be watering tomorrow around 7 pm with a earthworm castings tea and mosquito dunk. Ill keep you posted

Temps too hot and soil not good.

cheloo85 said:

View attachment 2706677View attachment 2706678View attachment 2706679View attachment 2706680 need help asap.i have 10 ak 48 about 20 days and have problems.all 10 have yellow leaves and start from bottom to top , and their turn black , some of them from top of the leavs and other from the midle. i have for neaw 1 hps 250w. soil made by me 2/3 peat moss ph 6,4- 6,9 and 1/3 perlite. temperature 80 -85 F. search on google i believe it have problems with pest and i sprait with soap and water for 3 days without ani result. another thing i put them 12 under hps(80-85 F) and 12 to my window (70-75 F).
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Plants are diseased and will die soon. Next grow use clean soil, pots etc and maybe a new strain.

I would first repot into better soil to see if they will snap out if it, and make sure temps, air circulation ect. is in check..if still scraggly then scrap em