I have an Ice seedling that is about 10 days old (germination and all) and I have noticed that the tips seem to be yellowing (but not burning). I pre-washed the Coco, it was an organic brand from the pet store called eco earth. I'm using a 3.5 gal pot, 70% coco 20% perlite. I flushed and charged the coco with RO water with 3ml/g Karma and 3ml/g CalMag+, and set the PH to approx 5.7 I'm using a 30W 36K CFL and a 23W 56K CFL and one 13W 160red/40blue LED for the seedling about 3'' away, but will add lights as it grows. temp is kind of high, around 80-85, but I have a fan constantly circulating the air. Inner coco temp is a cool 70. I don't think its nute burn i think it has a deficiency in either Mag or N? any thoughts?!