ok, but if all my rocks were 100 percent dead, they would be all white? like not retain any color at all? there are some areas with spotted white areas...and some areas are nice and green color, and red, and whatever...but my tank isn't very clear, so i cant see a lot...so from what i see it looks like mostly dust and sand. i just wanna make sure everything isnt dead....and also i took a piece out to look at it...and there was like a tentacle coming out of it. about 1-2 inches...brown and slimy. i touched it and it moved slightly after i touched it up and down...fractions of an inch, but it moved...so i have no clue what it was or is...but it was alive, so that made me happy.