1stGrow - Critical Purple - ViparSpectra

I have been using LST in the form of a fan on medium speed to try and strengthen the main stalk of the plant as well as planter rotation to strengthen the main stalk for tie down LST. So far I've been impressed with the rate of growth and the overall experiment. For what it's worth, the growth wth is very very similar to a hydroponics growth. I'm sure as the experiment continues I'll notice some big differences. It does appear to have either a minor potassium deficiency or a little too much nitrogen. Will monitor and update as needed. The above signs may have been trying to indicate the main stalk was weakening from too much weight from vertical grow rate. This would ultimately lead to a fractured stalk. Is this what happened or is it a fungus or disease problem? Plant C sprouted within 48hrs and will be 6 days behind Plant A. End goal of harvest is still 360g from the two plants combined. Both plants are looking very happy regardless of the toxicity or deficiency. Strong strain nonetheless.