Will sand work in a 29gal. setup stock with Hatchets ,neons and little tetras and some small invertebrates? I never used sand before and like the look of silica sand. I dont have the lights for plant life so Im using fake plants for now. I have a nice big piece of driftwood I putting in there.My tap is good with ph at 6.5. SO sand or no sand? Thanks for your time TOM A.