Ya i use the pure blend stuffthey are real close. i ordered some botanicare pure blend pro bloom 1..5-4-5. jsut 1 quart gonna use it on my C99 this is way better than the bloom im using and its 100% organic so no heavy metals and other junk. I know it will improve my bloom size. Man this stuff isnt cheap lol.
Ya i have seen GH go slightly yellow before too but this time it was extremely noticeable.I use gh flora series too and my fan leaves get yellow as well really late into flowering. I want to say its normal but I honestly don't know the facts behind it lol so I'm not going to say it.
interested to see what your final numbers are between the 2 lines tho. scribed to seeeee. they all look amazing too btw