I am a first time grower and some of my larger fan leaves have started to turn purple around the ends of the leaves. I am just entering week 6 of flowering. I live just outside of Toronto Canada and a few nights ago the temp outside dropped between 50-55F. Should I be to worried about it? Should the leaves be removed as my plant is very bushy and could use some more light into the middle of the plant? I'm not sure what strain of plant these are as they were given to me as a gift. Any help or advice would be greatly appreciated. Thank you.