The main question is why do you want a sand sifter? They can make a mess of a tank, and eat all the "good" critters in a sand bed. Ditto with the sand sifter star, which will starve in your tank, most likely. Do you have an algae problem? Lots of Debris? You may want to go for a sand sifter snail or conch of some sort. Much cleaner, and much friendlier to a sand bed.