I didn't say get normal sand, you can get sand for fish tanks at Petco or Petsmart that is not play sand or pool sand. It's special sand that is formulated for Saltwater Fish tanks, but not live sand. It's cheaper than live sand and you get more for around 15 dollars. I believe it's around 30 pounds of Topfin sand for 15 bucks. If I had a 90, I would buy around 3 bags of normal sand from the pet store, and than 2 bags of live sand to put on top. That would give you 130 pounds of sand.
Fish Sticks, the best thing you can do with your dead fish.