GlueBerry OG - Second time 'round

My second grow. Many mistakes first time around so I hope to apply what I learned and come out with a better result this time. These are bag seeds from Hillside Pharms and AKAIK Dutch Passion genetics. They sprout fast and grow strong and were pretty resilient to my stupidity last time around. This time I've decided to mainline two of them as they are supposed to be pretty tall girls and with the sativa dominance I think they make a good candidate to experiment with some training. First week I started in mini plant cells and moistened them with tap water pH'd to 6.5. They were placed in a humidity dome and kept at 28c / 60+ % rh for 5-6 days. Once again they seemed to sprout and take off. Cotyledons died pretty quick on this strain twice now but all other growth seems strong, healthy and green. Now just waiting until they are big enough to top and begin manifold training.