Best sand sifter for sand bed

[fiorano]

depending on how much sand you actually have conches do a good job of cleaning the sand and so do sand sifting stars but i think conches need a fair bit of room unless their fairly small. i also have a sea cucumber but he doesn't move around all that much but does a good job of a smaller area and just recently decided to split and turn into 2 sea cucumbers hahaha