Your beautiful Betta fish deserve nothing less than the best. Activ-Betta's White Sand Bio-Activ Live Gravel is an all-natural substrate specially packaged in LIVE freshwater to instantly cycle your Betta aquarium. It contains the natural beneficial denitrifying bacteria and trace elements. Live aqua flora found in nature helps create a healthy environment for your beta fish. Instant cycling process starts the moment you add water so there's no waiting time, simply add the fish and you're ready to go. Bio-Activ Live White Sand gravel is perfect for fresh water or Betta aquariums. It features grain size ranging from 0.1 to 0.5 mm.