Having some issues.

Hello, I have 2 octagon verticals, with 2 1000w hps and a 1000w MH in both. This run I'm doing green crack, along with a lot of new changes. I'm using FFOF soil, and house and garden soil a/b, and roots excelurator. I started noticing some leaves turning a very light green, some plants are only producing 1-3 petal leaves, the stems are purple. So I tested the ph after ferts and it ended up being 7.5, so ill fix that. Do you think that is causing these problems or is it something else also? Thank you.
 
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