My [plant 1] started to have bit yellowish leafes. Is it just not enought water or is it somethig else? I'm watering when the coco seams to be more or less dry on the top because i don't want to overwater.
It really depends where this yellowing is can you make picture above the top of the Plant ( eagle sight)
because to me it looks like a lightburn.... i dont know ich light you use but 10 cm distance=?... always to close
( out of weak fl bulbs)
Yellowing leaves can show a lack of nitrogen not necessarily overwatering. Over and under watering will have droopy leaves.
A good way to check if you need to water is by digging your finger an inch deep and if it’s wet then no need to water but if dry then it means you need to water