Please help! What is this? And what is going on?

[Gardengal420]

I am growing in fox farm ocean forrest. I've had a few difficulties on my first grow. I thought I had then handled then I see this.
The only thing I can think of is because of the foxfarm they aren't ready for any liquid bloom nutrients yet and I didnt know. So I'm thinking the ph may have went too high and caused a nutrient lock out, which could have also caused iron chlorosis? I checked the water with strips, then I checked the soil. Its between 7-7.5
It's even affecting the new leaves.

 

[Gardengal420]

Oh! And my boyfriend talked me into spraying them with baking soda, dish soap and water, foliar spray to help keep spider mites away. I dont know if that matters.

 

[Mbunaaddict]

Clueless, but watching.

 

[Gardengal420]

Root rot due to the boyfriend being a know it all and overwatering my girls plus added with high humidity with an uncontrolled environment