I wanted to prepare my substrate for a diamond goby. I have a mature 65G reef tank with ton of pods. I used to have gravel, but removed it couple weeks ago to switch to a substrate more appropriate for a sand sifter. I was reading that "sugar grain" (0.8-1mm grain) salt is still appropriate for sand sifters and will not damage diamond goby's gills. Is that true? Had anyone tried it? If possible, I would prefer not to use fine sand, since "sand storms" created by a diamond goby can get annoying soon.