Nirvana Ice question

were rolling into 7th week of 12/12 finding major yellowing of mid fan leafs. friend and fellow grower says matureing! anyone out there ever do any growing with these style of ladies? just the ice is doing this other girls in the same room are fine

I have grown ice for a couple of years now and have never had anything like you are describing happen.
It always seemed that what ever I grew with it had problems.
What I have found with this strain is that it likes its nutes... 1300ppm hydro.
I have a crop going now on over 8 weeks and I wish it were slowing down, just keeps on getting more frosty.

Im growing in soil,getting ready to flush for finish

I've only grown it once so far(have 5 more almost ready for 12/12, right now), and if I remember correctly, mine looked similar to yours, at that stage. They turned out excellent though, and yielded well, so I wouldn't be worried about it too much. As mentioned, they are heavy-feeders, so next time around, up the dose a little bit, and see if that helps. Just watch for the tell-tale signs of overfert, and you should be just fine.