Thanks for the pics…
I’m kinda worried about your plant honestly, that stem looks really thin, it looks like it is “Damping Off” possibly… this happens when the pod is too wet around the base of the stem and it cuts off oxygen uptake by creating an anaerobic environment, and is also potentially caused by a bacteria called “Pythium” that attacks the root zone : Pythium, The Hidden Terror For Cannabis Plants - RQS Blog
- What do your roots look like? Are they brown?
Check this plant out, looks like a very similar thing: https://www.allgrowers.com/t/first-grow-skywalker-og-kush/6638/75
One plus side is that it is still green at the very base, but my advice for you is to
Get that pod pushed up like a half inch above the reservoir level ASAP so you can dry it out. You might need to take some time today and use paper towels around the pod to get it to dry out. A fan or two will help too…
Support your plant even more to make sure she doesn’t fall over, that cord might not be enough. The problem is that she is going to continue to grow and without support the weight might snap her.
Check… is your bubbler working inside the Grobo? You hear bubbles still?
Does that thin spot on the stem seem mushy or wet?
@Todd.grobo had a plant that recovered from damping off that looked a lot like this, so I think you might be okay, but just be careful!
Also, those red stems at your lower leaves could potentially be a nutrient uptake issue which makes me wonder about your root system too. Sometimes plants have red stems due to genetics but it can often be argued : What causes red stems in cannabis plants? | Grow Weed Easy
Multiple reasons but stress is a factor too.
Don’t let me scare you, I am an inexperienced grower but I have been PARANOID about this exact thing that might be happening to your plant for 39 days now after I’ve seen the destruction it CAN cause if untreated. I saw your plant leaning and I had a feeling this is what your stem was going to look like. You can still potentially save her!