Hay rastadizasta, I don't do clones, but I have some basic questions for ya. So these are clones? Yellowing is usually a sign of low Nitrogen. But on cuttings, I'm not sure. Can't see any of your pics. Start your pic in your album and the you'll be able to post them here.
Speckles, what do you mean. Like small brown spots? Does the mother have any of these brown spots? Take a 30 or 60x scope and look around on the brown spots for little tiny black dots. If you find the black dots, let me know and we'll go from there.