For the past couple of months, I have been swapping out my crushed coral substrate for aragonite sand. I prefer the look of the sand, but I have been unable to get my water clarity back to its pre-sand levels. The tank is a bit overstocked and has a lot of filtration so I was wondering if the water flow was too much for sand. At this point I am considering going back to the crushed coral. I'm hoping someone has dealt with this issue before and can guide me. Thanks!