Shes 8 weeks old I removed the screen just a beast
,what are you feeding that girl?
You see a cal mag problemNice size plant. I often times use Fox Farms soluble trio and it's easy to over nute and burn the tips. I also get the cal/mag problem that you are facing. Just try to stay on top of those pesky problems next run and ph your water, add less nutes and the such.
It's probably more Mag than Cal. What did you think was changing those leaves?You see a cal mag problem