best way i found to keep extra live sand live is to aid a air stone from time to time. try to keep the temp stable and depending no the amount of sand,ad 1 or2 flakes of fish food abought once a week so that the bacteria have something to eat.the bacteria/small critters is what makes it live.if they die then u wind up with dead sand.check the water from time to time and it will be ready when u r.