interveinal cholorosis in lower leaves is usually calmag deficiency related but many will say it's too early to have a calmag issue at such an early stage. I'd try giving some with next watering and check if symptoms go away. good luck.
Thank you for including two of our most classic varieties in your first grow diary. From Kannabia, we wish you all the best for them 💪🏼🌿🌿🌿, and we hope you enjoy the experience! 👨🏻🌾💚