Who's your favourite (or not) sand sifter ?

[Coralgurl]

I have a orange diamond goby, sand snails and a sand star. By far the goby does the most, he never stops sifting. The only issue I have with him is where he has decided to sleep, he buries the hole during the day and kicks the sand out at night. I have a mini nem and a mushroom on that rock, the nem seems ok but the mushroom relocated as it was constantly under sand. I can't keep any corals in front of that rock but I'm ok with that. He doesn't kick up sand anywhere and IMO was the best addition for keeping the sand clean.

[Reef Pilot]

In my other display tank, I have 2 fighting conch, and used to have a tiger conch, but he died. They move around a bit, but don't do much to clean the sand that I can see. Keeps my Copperband interested, as he tries to pick under their shells. Not sure if he is looking for food there, or trying to get at the snail itself. Not sure why the tiger conch died (might have been the Copperband bothering him), but he didn't move for a couple days, and when I picked him up, it was a really bad stench, so I knew he was dead.

But for sure, my gobies in my other tank, do a much better job of keeping the sand looking clean and fresh.