brown growth on glass.
 

well, finally got things going with the rock curing.

now, i have some brown slime growing on the sand and back of the tank.

-what causes this and what can i do to fix it?

You'll pretty much need to start over. Just kidding. :) Those are diatoms and it's a normal stage in the starting of a tank. It'll go away on it's own in no time at all.

they look hideous don't they:lol: they eventually go away and when mine left never saw any since