aquarium dried up 4years...salvageable?

[Angela2016]

Is there any chance that the chlorine can cause any further or irreversible damage to the live rock or sand?

 

[Diesel]

Take rock and sand out.
Your sand is waste anyways IMO but rock still can be cleaned and cured.

 

[cmcoker]

No, it's fine. some people bleach their dry rocks to help clean them. I have used a hose to wash sand on every tank I have setup.