Old live rock

[Sgebhardt0]

I have like 40 pounds of old live rock sitting out in the yard from like 5 years ago and wanted to know if I could use it for a second tank I want to make witch is a 29 gallon eclipse should I just rinse it off and put it in and let it cycle?
Ps it was pretty dirty when I broke the tank down.

 

[Sgebhardt0]

Hello did I post this in the wrong place sorry if I didn't do something right or if the answer may be in a different place could someone redirect me, thank you.