Welcome to the family @DocSwink …
I will tell you I’m in FFOF and that crap has me going crazy chasing pH numbers. Do yourself a favorite try not to stress, but your pH is low and Fox Farms is notorious for this happening. I saw that you’re changing to another medium next grow, me too. Check out my topic where I’ve asked the forum to tell me what they grow in and what nutes they are using. Might be beneficial for your next grow.
BTW… plants are not looking bad…