Sand movement

[mattr]

I am looking for options for moving my sand around as much as I can. I have about 1.5- 2 inches of sand on the bottom and I want something that moves even the deep parts of it.

I have a goby and pistol shrimp pair on the right side of the tank and I like how they are always turning the sand.

I recently got a sand urchin, I have nasarrus snails and the goby and shrimp pair.

What are my best options for getting deep sand movement without getting a sand sifting goby..

I have a 50 gallon reef tank