Not really a sand sifter but it will take mouthful's of sand and filter them out in it's mouth is the Hector's Goby. I highly recommend them, I had one that after almost two years I believe died of old age as it was mature when I got it. Sifts like this all day and will eat other foods. Mine loved NLS pellets and that was all he would eat. I also feed frozen mysis and a frozen mix and he wouldn't touch them much at all, but would stuff himself on the NLS pellets.
I do agree with the others most of the sand sifters will destroy your tank, and it's just not big enough for them.