So far I am happy with my yellow head...:biggrin: Yes he does move sand..:lol:

Thankfully, mine has chilled out a bit over the last couple of weeks...

For that first week though, it was like a snowstorm in my tank

Maybe he was excited to be in a new home, I have an ornate goby and he does the same thing too but it's not that bad.
He had a death wish the first year I got him. He jumped out twice and both times he was dried up and stiff as a board. The first time I put him in the QT and he sank to the botom like a rock and it took him a week to be able to bend a bit. A week later he was ok and was returned to the main tank. The second time I had no choice but to put him back in the main tank since the QT was occupied and he still pulled through, tough little guy huh?