AK-47 + GG4 Auto in DWC

Getting worried. Ak-47 isn't really doing anything and doesn't look healthy. Not exactly sure what to do, I've kept the nutrients, air flow, pH, temperature, humidity, and anything I can think of at good places, tried pH of just over 5.5 and just under 6.5 to see if somewhere else in that range would help, nothing. Any help would be appreciated. It's the only seed out of 5 that germinated so I'm thinking maybe it's just a bad batch of seeds and it was destined to fail :(. We'll see. GG4 auto is doing pretty well though. Some of the leaves look a little droopy, which is concerning, but otherwise all is well. Notes: - added humidifier to reach about 50% - doubled nutrients in water and got pH to about 6.1 - rotated all buckets to confirm even lighting