What if you turn the lights on in the middle of the night? Does it have color then?
That it looks like that when you take a pic in the dark, but it's actually normal.....
Not trying to be funny, but the pic looks to me like it was just taken in a dark tank so there's no color showing and the spots look like sand....
no worries, bc I thought the same thing at first. it's not sand.
maybe nothing to worry about then if it looks healthy in the "day light"...