thanks. The whole back and right side on the tank are covered I can't remove it. I like it to much. The sand was given to me. I added some play sand to it. It was just black at first.Yes,I would be too.I remember my armatus reacted very violently to being netted and moved....good luck with that.
I used similar sand to yours when I kept African cichlids and you appear to have a carpet of algae on the back wall of your tank,I like the way it looks.
The armatus jump out about a year ago during a feeding and I thought I killed it. It was out of the tank for a whole minute : ). Finally found a towel to pick it up with. It was upside down the whole night in the tank, but when I woke up it was still alive.
Now I'm nervous it will due on the move