No big deal on red stem.
The big deal is, they are in the same ground, spaced by couple of inches. Separate them right now before it's too late! they won't have sufficient room to grow!

NO on the sand, perlite dude, find some.

Take couple of minutes and read my grow man, worth a look. Very simple grow. CFL, SOIL, Organic nutes. Except for Big Bud.

Anyway, with your camera, put it on macro mode, with flash. try not to move too. It'll make better pics for us to see!

:thumbsup: