What’s going on?

[Ladyleaf]

My clones have started forming this on their leaves. Any ideas what it is and how I can fix them pls?

 

[Therighthigh]

Nutrient deficiency flush plants for a couple feedings a go again

 

[Beachwalker]

My clones have started forming this on their leaves. Any ideas what it is and how I can fix them pls?

What's your medium what are you feeding what's your recent runoff? Post picture of whole plant in natural light