Okay, so I started my tank a few months ago and the sand is the stuff from Marco rocks, it came as part of a package when I bought dry rock This stuff is so fine that even a small powerhead kicks it up and has lead to the water having a slight haze, and the sand got everywhere, including the overflows, the bottom of my sump, and in the skimmer body. I want to switch to something a little heavier I currently have about 2 inches of this stuff on the bottom of my tank, with some spots a little deeper due to the sand shifting around Can I swap some of this crap out for something a little heavier that wont constantly blow around and cloud things up? My main concern is releasing the sulfide gas I've read about in other threads, I don't know how long a tank needs to run before that is an issue. Assuming I can swap it out, I can just use a cup to grab the sand currently in the tank to pull it out, and replace with something heaver (some sort of aragonite sand) Correct? Should I pull all of this crap out, or pull out some of it and put heavier stuff on top?