Re-introducing sand

[bromion]

I've sucked out a lot of sand in the process of cleaning my tank. What should I do with it before adding it back to the tank, if I want to put it back in?

 

[seaham358]

I would toss it... If you want more add new..

 

[melosu58]

I agree that you should throw it out. No need to introduce anything back in your tank.