Sterilizing Live Rock

[byee]

I recently shutdown my 10 year reef tank because the live rock was over taken by mojano and a blue leathery stuff in my 120 gallon tank. Tried various different chemicals to resolve the mojano problems but if got progressively worst.

Since the kids are older, they've lost interest..... I just decided to sell it but kept some of the unique pieces of liverock.

I'm now in the process of setting up my new 45g OBD cube tank and don't want the mojano nor the blue leathery stuff to affect my tank.

Whats the best way to 'sterilize' the live rock? I thought of boiling the rock in a pot to sterilize the liverock but also heard I can soak it in bleach for a few days.

Which method is better?