Help what’s wrong with my seedling?

[Buff71]

Hi everyone this is my first grow and I’m just wondering if anyone can help me?
im growing 2 seedlings at the moment from seed 1 is berry bomb which seems to be going fine and the other is royal medic cbd. They are both growing in the same type of pot with the same nutrients both in coco coir/perlite mix in a grow tent with led lights at a temperature of around 24 degrees C but the new leaves on the royal medic cbd seedling have come up yellow. Have them sitting at a 6-6.5ph level
any help would be appreciated thanks have attached a pic of the berry bomb which looks normal and the royal medic with the new yellow leaves could it be sulphur deficient?

 

[Listersmeghead]

Hi everyone this is my first grow and I’m just wondering if anyone can help me?
im growing 2 seedlings at the moment from seed 1 is berry bomb which seems to be going fine and the other is royal medic cbd. They are both growing in the same type of pot with the same nutrients both in coco coir/perlite mix in a grow tent with led lights at a temperature of around 24 degrees C but the new leaves on the royal medic cbd seedling have come up yellow. Have them sitting at a 6-6.5ph level
any help would be appreciated thanks have attached a pic of the berry bomb which looks normal and the royal medic with the new yellow leaves could it be sulphur deficient?

Alright buff71.
The ph for coco is more in the 5.7-6.1 range, if you change the ph, you'll see a change.
If you go to the "growers forums" section there's a coco growers thread in there, lots of great info about coco use.

 

[Buff71]

Thanks for that will do