The 2 plants always looked different. One I suspected had some pottassium issues. Anyway, it looks to me that the one with problems has to be a hermie?
I seen a sack and took it out pronto! Looked at a couple and they had small seed like structures inside. Also another seemed to have pollen in the sack as seemed gritty when running between the fingers.
It was pretty cramped inside anyway. So I'm thinking it's better to give the remaining plant more space to grow and better canopy cover?
Take the other for some popcorn nugs for rosin maybe and shake rest for hash.
The picture below is the remaining good plant.
Any confirmation would be grateful. As if it's not I think I may continue to save it.