Ive decided to do some reviews on things which i couldn't find much information while I was doing my research. http://www.marcorocks.com/products/...g-included-all-sand-ships-usps-priority-mail/ 29.99 per 40 lbs shipping included. Even though there wasn't a ton of info about the coarse sand offered by Marco Rocks the priced made me decide to take a chance. I've seen mixed reviews and it seems that people either don't have any issues or they have all kinds of problems. So far, my experience has been very positive. I initially ordered just 40 lbs of the fine sand but changed my mind about it after reading some peoples thoughts online. I was afraid that my powerheads would blow it all over the tank and make a sand storm. Because of this, 3 days after I placed my order and just before it shipped, I emailed Marco and asked to change my order from the fine to the coarse. I also mentioned that I would like to order another 40 lbs. Marco replied within 6 hours, changed my order and shipped both boxes before I even paid for the second box. So, skip forward just 3 days. This was sitting at my front door when I woke up. Waiting on the second box but I assume it will be just like the first. The bottom was broken open but the bag inside was intact. As you can see, 42 lbs with the box and bag. Nice light tan color, not yellow like the picture on the web site. Un-rinsed: Rinsed Like people have said, It is a mix of really fine sugar sand with some larger stuff mixed in. Once its in the tank ill update this post.