Yellowing fan leaves during flowering

i have three plants roughly 5 weeks into flowering. not sure of the strain, i had three different ones given to me from a friend and the seeds got mixed into the same bag. (tutti frutti, northern lights, and one other who's name escapes me at the moment.) two of the 3 are the same i believe and the other one is not. they have all been on the same schedule since sprouting and the one's fan leaves are slowly but surely yellowing and dying off starting at the very bottom of the plant and moving up. other than that problem all other leaves and buds are growing fine and what seems to be healthy. I am assuming this is normal, but would like to be positive, this is my first grow that has actually worked out and i would like to see it to the end. pictures will be loaded shortly when i can find my camera to do so. any advice is appriciated

you should post pics buy you are all good.

Bloom nutes dont have really much nitrogen so the fan leaves are just dying as a natural part of the plants life. Its fine as long as you are about to harvest soon, right. If you are at 5 weeks, you should be thinking about doing a flush for best end product.

here are a few taken with a macro lens, first two are the same plant, the other two are two different ones.

what resolution is that?

1280...didn't realize i can put it higher, also forgot/dont know how to resize the image so i apologize for the huge images

There fine..

yea i flushed them and they seemed to perk up