Whassup ? 4 seedlings - same strain - shared reservoir - 1 with leaf issues

[BirdieNumNum]

4 seedlings - same strain - shared reservoir - 1 with leaf issues

Grow journal is here

CBD AUTO - STRESS RELIEF

Plant with what looks like a less developed root system is one with the ropey leaves.

 

[Old Salt]

It may not be getting enough nutes. A top feed system is a good idea when the plants are small.

 

[Chris Scorpio]

Are those other holes always open??

If so better cover them up or your asking for trouble