spots

I bought some clones about a week ago and since I have put them in my tent three of them have started to develop yellow spots on the leaves. Its been a couple of days and it hasn't gotten much worse but worried that it might affect them later. I use worm castings as my nutrients since I am...

This is my first time growing cannabis and I don´t know much. Some transparent spots appeared on my new plant overnight. Is this some kind of bug? is the plant sick? what can I do? Thank you.