Both plants are young but yet showing defiencies. Yellow cotyledons means "N" is not present or not being delievered to them.
However, You dont need to feed them with nutes because its too early.
Transparent pots are also not a good idea. Roots must stay in dark.
Your seedlings are searching for light.
I'd start with a reasonable amount of water + lights for the seedlings + covering the pots with some material that'll prevent the roots from getting direct light.
Happy growing