Ravenberry - Mephisto Genetics

Had a bit of a struggle getting these going in coco. Initially had way too cold environment in my grow room and thought the sprouts died in the following 24 hours after planting the germinated seeds. Fixed the room temperature and they started growing again, so all is not lost. Having some yellowing on the cotelydons and not sure what the cause is. Using Canna A+B nutrients with RO water starting at .2 EC. It's my first time growing in coco with liquid nutrients so I'm sure it'll be a learning curve.