Going through layers of my sandbed now. I sucked up a sample from about 3/4" to 1" down at around the thickest area of my sandbed which also happens to be along the front of the glass.
I found a few things I had not seen before from my tank . That's always exciting. One if which showed me the origin of something I had seen previously. I will have to go back to some previous videos and watch again.
I got something over 200 pictures and many videos. Quite a few on the last thing I found just as I was about to shut down for the night.