What light are you using? How far away was it... how far now?
The second pic looks fine to me. The first looks like a little nute burn starting up. Are you adding any nutrients, etc. to your soil? "No" would be a good answer, as those plants don't look far enough along to need anything.
It'd be weird to be in need of any dolomite at this early stage... and no noob should mess with hydrogen peroxide unless they really know what they're doing (in which case, they wouldn't be noobs... no disrespect to earlier input.. it's just two Ritalins, 4 Budweisers and 3 nice hits of my NEWLY HARVESTED FUCKIN' WEED... TONIGHT... YEAHHHHH!!!! sorry...).