upgraded tank substrate ?

[ncmx3]

I am in the process of migrating my two cycled 90g reef tanks into a 210. My plans are to move all live rock, water, coral, fish to the new tank. My question lies with the substrate. Do i rinse the substrate I have and use it in the 210 or do I buy all new substrate? Im using sand currently.

 

[Crawfish00]

I'd change it out personally...IMO The old sand is dirty and not worth the cleaning