Is it 100% organic? If not, or you don't know if it is, then I wouldn't trust it. Most people go with Fluval Peat Granules, or Sera Peat Granules; Putting the granules into a filter bag, tie off the filter bag, and put it into their filter. I found my filter bags at PetsMart for like a couple bux, I use my filter bags for carbon in my filters.