Fast Buds vs Sweet Seeds

End of week 3 Just did round one of LST, sorry for lack of before pictures. I also cut off the first single leaf and its chute, hoping to let my plants focus on other bud sites higher up. Today (day 21) I watered with BioBizz BioHeaven and ActiVera. I also used some Organic Rooms from Boom Nutrients. As you can see, I lost the Gelato Auto from Fast Buds ... The seed got stuck to the baby leaves and it never broke open. I tried to help with tweezers but it was too late. Looked like it would work, but then it shriveled up... It might be better to have 3 instead of 4 plants in this 80x80x160 cm tent. I put in an oscillating fan in the corner and need that extra bit of space...