Help please! Auto-flowers in hydro having issues!

Hi everyone, let me start with I've been reading this site for a while now but I'm a first time poster...

This is my first auto-flower grow, so I'm not sure exactly whats going on but it eems bad. I read all the posts about defeciancies etc..but I would really like an experts advice on what to do.

Set-Up:
I have 5 feminized auto-berrys and 5 feminized auto-lemon haze. 4 of them are in aero-gardens, while the other 6 are in a hydro drip set up. I'm using earth juice complete line of organic nutes. The light s is a 600watt hps.

I started all the seeds in the aero gardens, all sprouted great, using no nutes only water. Within the first 5 days, 2 of auto-berrys started showing like rust colored spots all over the leafs. After one week, I started them on 1/4 strength earth juice nutes...and now a week later their all showing yellowing, some stunted growth, curling tips, etc.. The ph was at 7.0 for both aero gardens and the hydro drip bucket...I realize now after reading that oh shit your suppose to keep the ph of hydro at 5.8 is what I've been seeing.

It's 75 degrees in the room, the lights are on 20/4 cycle. I'm not sure what to do at this point...flush with only water for a few days? Wait and see if the corrected ph I just did yesterday will solve the problem? I'm not sure if its just bad seeds, too much or too little nutes, the ph or what...but I really hope someone can give me some advice on this. Here are some photos

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