Can anyone tell me the difference other than 1 being alive and the other dry and weight between these two in the pics it looks like the seaflor grain is larger or is it just me?
http://www.fosterandsmithaquatics.com/product/prod_display.cfm?c=3578+9805+7326&pcatid=7326
and
http://www.fosterandsmithaquatics.com/product/prod_display.cfm?c=3578+9805+7318&pcatid=7318
http://www.fosterandsmithaquatics.com/product/prod_display.cfm?c=3578+9805+7326&pcatid=7326
and
http://www.fosterandsmithaquatics.com/product/prod_display.cfm?c=3578+9805+7318&pcatid=7318