Aeroponics grow - Blueberry Kush Fem'd

About 2 weeks in seedling tray / warming mat and then transferred over to Aero setup; 3x of blueberry kush. Seeds were about 3 years old; was pleasantly surprised that they still germinated. 1 week under the aero setup and the plants are looking a little unhappy; somewhat normal on aero setup. Some nute burn on leaf tips; cut down from 300ppm to 200ppm. Switched back to famrus blurple light; the spider sf1000 is a bit too strong for this stage and was burning the plants a bit.