Crispy, crumbly leaves...started with fans getting darker. What’s going on here??

I pretty well summed it up in the title. This is the second plant to go this way on me and I couldn’t figure out what I had done to the first one before time to chop. Was fine til 6 or 7 weeks flower, then fans began to go reddish purple, then some spotting and yellowing and then so crispy they just fall apart. Life has been to hectic to check ph, but last time it was 6-6.5 (I don’t have a digital meter and those colour charts are hard to tell for sure). Will do a test and post here though. Will also get a whole plant photo here shortly. Just curious if anyone had run into something similar? Thanks all!

Sorry, additional info....
Been all organic in soil fed with a liquid seaweed, fish, biocanna Flores, and some blackstrap molasses. I’m wondering if I went wrong with some pelletized hen manure fertilizer added a few weeks into flower ...I didn’t use much but I know hen shit can be pretty hot (figured it’d be safe in the pellet form)-could this be nute burn? Tried flushing for a week or so, but didn’t seem to help.

Looks like phosphorus deficiency.

You will get necrosis, rusty spots and purpling

Looks like phosphoro

Never mind, lol. Minty's got you.

MintyDreadlocks said:

Looks like phosphorus deficiency.

You will get necrosis, rusty spots and purpling

Click to expand...

That sounds pretty accurate. Am I recalling correctly that a low ph can cause p lockout? I tested runoff I collected yesterday and it looked like maybe 6 or a bit under. Again, hard to tell with the drops....gotta get a digital meter for my apparent lack of colour perception. Or is it possible this strain (pink) just wants more than the other strains I have going? If I correct it, will the leaves rebound? It kinda feels like they’re done for. Thanks for the feedback!

Also that kinda makes sense...I added some bone meal to my soil mix at the beginning and a wee bit more again at start of flower- if it’s really going through it would have used up what I put in by now. Unless it’s lockout caused by something.

looks very over-fed to me, burnt up.

yeah man . Super dark , some glaze to the leaves . High N for sure . Tips are clawed .