How many sand sifters for a 6ft aquarium?

[Ziggo420]

I currently have a pink spot watchman goby, a sandsifting star, and a tiger tail cucumber, but they don't seem to be making a dent in my sandbed. I was just curious in the experience of others how many sandsifters does it usually take to keep the sand bed turned over in a 6ft tank? Thanks in advance for any advice.

 

[biophilia]

I’d consider adding a bunch of Nassarius snails. Start with 25 and add more
If that doesn’t help. Seeding with amphipods will also help as they will be out feeding on algae growing on the sandbed at night.

 

[Tcook]

Agree with above. Also 2 fighting conchs.