I have about 100lbs of live sand (sugar/oolite) that was taken out of my established 120g. This was enough to cover my entire bottom about 2-3 inches. Still scooping it out of the tank into 5g pails. Will probably need to be rinsed, lots of live though in it still (Small stars, pods, ect) If you want some call me 316-259-3803.