Yep, 2 bags. I figured 100lbs would be enough and Joel agreed. I was there about 1:30. With stuff being 30% off, I will return for equipment if I can. I'm really thinking about drilling instead of an overflow box. As for live stock, I don't have room for anything else in my little 29. After making the trip to Brandon's (Prada) my tank is pretty full of coral. Maybe some cleaners but that would be it.(sad) So far the scallops seem to still be happy. They have been scooting allover the place.