Sand sifting gobies are great fish for a deep sand bed with the correct texture of sand. If you are getting a lot of clouding your sand is probably too fine.
I have a pink spotted watchman and love it. It is very aggressive toward other fish and is a jumper so needs to be kept in a tight tank with large fish or alone. My sand is a mix of sugar sized, slightly larger, and live rock rubble and there is no clouding. He is constantly rearranging the sand searching for food in it.
I have a coco worm, hermit crabs, shrimp and star polyps with it, all of which are fine with the constantly shifting sand base.
I agree, they wouldn’t be the best fish for a tank that you need to worry about things being covered in sand.
