Uh oh, what's happening

Purple Punch Auto by Barney's Farm
SF-2000 24/0
Medium is Fox Farm's HappyFrog amended with Nature's living soil autoflower
Using Recharge once a week(Just started this week). Also topdressed with NLS today as well.
4x4 tent, 6in fan/carbon filter, 4 in intake, fans around
Average temp 73-75. Average RH 50-75%
Any ideas as to what could be causing this? Originally I thought it was water droplets hitting it accidentally as I was watering.
Day 25

 
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