By overzealously buffing my tank I have locked up my sandbed. So I'm going out tommorow to buy new sand. Which type is the best? I'm thinking dsb in a 58 oceanic.I heard that Seaflor special grade sand for plenum type nitrate reducing is good. I used to have sugar sand but that stuff was a mess. My powerheads shot it everywhere. Any ideas? I only have a bakpak so I need the best possible plenum to reduce nitrates. Thanks.