Hi all, I've noticed some strange changes in my plants recently and am trying to find the cause. I am 2 months into my first grow and just recently joined this forum. I have 2 plants growing in the vegetative state, 2 moths old, germinated about 1 week apart from one another. One is an auto flowering Tangerine Dream and one is from a seed found in an unidentified bud (most likely not auto flowering). The plants started in rockwool cubes and were transplanted into 5 gallon fabric pots in Fox Farms Ocean Forest soil with some extra perlite mixed in. The plants are sitting under a 600W LED light 24 hours a day and I have not been feeding them any nutrients besides what the soil can provide. The temperature is around 65-75 degrees in the grow tent most days with a humidity around 65-75%. I noticed a few days ago that some of the branches have become a red/purple color on the top half of the branch only. Leading up to this I had noticed some fan leaves developing small brown spots as well, generally on the lower leaves but not exclusively. I originally thought the brown spots could be a calcium deficiency, but the red branches coupled with the brown spots make me think it could be a phosphorous deficiency instead. As this is my fist attempt growing I wanted to hear from others who are more knowledgeable in the area before I start trying to fix something I have falsely diagnosed. What strikes me as strange is how perfect the line is between the green area of the branch and the red area of the branch. The transition from red to green is a nearly perfect, straight line that begins almost exactly halfway through the branch every time. A second question I have is in regard to the drooping fan leaves I have been experiencing on the plant that came from the unidentified bud. I realize that over or under watering can lead to this, as can other deficiencies in the plant. And in my case it may have something to do with the red branches mentioned above. But is it possible for leaves to droop down under their own weight while perfectly healthy? I ask because the plant in question has very large fan leaves, and I don't know if I should ever expect them to stick straight out due to the size and weight of the leaf, or some plants naturally have droopy leaves due to their size. Thanks for taking the time to read this and for any help offered, if I left any details out or if anyone would like to see more pictures I'm happy to oblige. Bonus points if anyone can identify the unknown plant I have if that's possible. All pictures are of the unknown plant.