Flesh eating bacteria

Not really but...

This necrosis has been progressing for about two weeks. I have flushed it twice with 7.0 ph water. I even checked the runoff ph, 6.6. The strain is apple kush. I added a fine bit of dolomite before the second flush. Can anybody suggest anything other than just "ph"? It is in ffof soil for 8 weeks and flowering for just over 6 weeks under 2 600w hps. 5x5 tent with vented hoods and 3 fans and more than enough exhaust. I used mighty wash just over 2 weeks ago before any symptoms were present...Thanks.

I dunno for sure but that looks a bit like leaf spot fungus, or maybe a boron deficiency?

possible salt build up or slight burn. you're so far along that it isn't worth addressing.