That pic is of my 40 breeder. 36"x18"x17". That was about 60-80lbs worth of rock in that tank. I sell the Dragon Stone (Scoria Lava) rock for $2.25 a pound. My minimum order is 20lbs. Each large flat rate box holds 20lbs. Shipping is $20.00 per box. So one large 20lb box would be $65.00 Total. If you buy more than 60lbs any additional rock after that goes down to $1.00 a pound. So if you bought 80lbs your last box would be at $1.00 per pound. Each box can only hold 20lbs so I would ship 4 separate boxes. I hope that clarifies it for you. If you have any more questions please private message me about the rocks. Let me know what kind of scape you are going for and what shape of rock you would like.