Day 55 --- Day 33 Flower. Temp is steady 70 to 80* water ph at 6.5 , great medium, etc. Since this plant is only 55 days old I didnt feed her too many times. All feedings were 1/4 strength to start and then 1/2 strength,,,etc. I've only fed her at full strength once. Is this natural leaf die off or is this nute burn or maybe even a Mag deficiency?? Any advice on what to do? Thanks.