Question when siphoning sandbed.

[fernalfer]

I have been siphoning the cyano off my sand bed to try and get rid of the stuff. Question i have is a lot of sand has come out of my tank. Can i put that sand back in the tank?

Also if i can, should it be rinsed and cleaned first?

 

[saltyfilmfolks]

You can re use it. Yea rinse it a bit.
your really just trying to lower the biomass of the cyano.