My wife had an orangespot diamond goby in her tank and it went carpet surfing as well after doing a superb job sifting all the sand . I've got a yellow watchman in my 90 and he just occasionally sifts a bit of sand here and there but he's still small, perhaps too small to get the argonite easily through his gills. Still, he has great personality and coloration and if you don't mind the construction, which I do, you could always put in a pistol shrimp with him and that would be fun to watch.