About 6 months ago, I purchased new sand for my 125 reef. I ended up getting super fine (didn't realize how fine the grain was) from marco rocks. About 160 lbs worth! Well, after 6 months, a bullet gobie and medium-high flow, I have had it with the sand storms!! I know the biggest problem is the bullet gobie, but he works hard at keeping the sand bed turned over. Between the gobie and flow, my acans and rockwork become overwhelmed in sand. I really don't want to start over with new sand, but it was a thought now that 1 of 3 tangs has HLLE.Removing the carbon is what I believe will aid the recovery of barely noticable HLLE (and my own version of super food), but I've read that dust can be trapped within the sand. Any thoughts on starting with new sand or covering the existing sand? Thanks to all