I'm a movie actor and the following is me trying to get into character. About 2 weeks into flowering I had heat problems for about a week. It got into the low 90's for 8 of the 12 hour ON light cycle. I have given it phosphorous 0-12-0 week into flowering and very little 10-15-10 half way through veg. I know the pics suck but what do you think is the problem. The heat problem is fixed an now they only see 80°C max. The problems are yellowing bottom leaves and circular brown spots that end up killing a few if of the fan leaves leaving other fan leave from the same fan ok. Although the ok ones are kind of light green. Its been about a week since the heat problem was fixed.

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A movie actor, huh? Lol, that's pretty funny. I assume you meant 80F right? If you're only giving it P, then you'll need to give it a lower dose of N and some K.
From the pics I'd say it's a pH problem....6.8 is a good pH for soil. However, if you're not giving them N and K, then that's your problem.
Good luck on your 'getting into character' Lol

__________________
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Yeah I meant °F and the pH is in the low 7's according to my crappy device. NPK according to my measuring pellets are all fairly high. I have given it a little bit of 10-15-10 since this problem started. I'm afraid to give more because I dont want to compound the issue. Would anyone recommend flushing the soil well with tap water?

I should say the brown in the pics is really brown and obviously pretty crispy.
Thanks

bizump. Please help or yell at me or something.