It really depends on what type of fish you plan on getting. The live sand will knock the PH up so high that most Amazonian fish (tetras, rainbows and the like) will not be able to survive. If you want African Cichlids, or Mollies, or Killifish or something, you would be okay. Still, it would be more natural looking to get some sort of sandblast or laterite...especially if you intend to keep live plants. So, in answer to your question, it depends.