Here is a pictures after the dust settled. I was trying to arange the rocks, but the dust kicked up again so bad I couldn't see what I was doing. This is wat was there when the dust settled again.I have 75lbs of tufa rock to add yet, so I hope it will fill up a bit
I also noticed some tracks accress the sand, so the crabs survived.
http://members.shaw.ca/whadmin/settletank.jpg
Walter