I purchased this because of the name, and from 0PTICS FOR THE OUTSTANDING PRICE!!! I used crushed sea shells $6.00 for 25 lbs. it took about 20 to 30 minutes to fill properly and I used about 15-18 lbs. Make sure to wash off the shells and let dry thoroughly this will get rid of the dust and no mold issues..
Rock solid, easy to transport, worth every penny. If I can recommend The Red Barn http://www.redbarnfeedandpet.com/ for the filling material? if not Please edit this.
Pros: It's all good
This review was written in the old system and had content requirements that are different than reviews written today.