> Susan, Are you saying that one big is about 40 quarts by volume? > > Larry Litten > Wilbur-Ellis Co. > (206)310-5530 > llitten@wecon.com According to here: http://www.plantedtank.net/articles/Soilmaster-Select-Substrate/26/ I suspect yes. A 50# bag was enough to put 3"-4" in a 75. If that is true, then two bags is way overkill for my 40 even assuming it compacts so. That would also tend to confirm What Susan is saying. Save your back and just bring one for me. Thanks again. -- Dana _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member