No Waiting…Just Add Fish! Activ-Betta® Bio-Activ Live Gravel is an all-natural substrate specially packaged in LIVE fresh water to instantly cycle your Betta Aquarium. Activ-Betta® Bio-Activ Live Gravel contains the natural beneficial bacteria and live aqua flora found in nature to instantly create a healthy environment for your Betta fish. BENEFITS OF ACTIV-BETTA® BIO-ACTIV LIVE GRAVEL. 100% Natural live® fresh water substrate Instant cycling® of your aquarium No waiting…just add fish® Perfect for all fresh water fish Contains live denitrifying bacteria and beneficial trace elements.