Downgrade - What to do with extra rock?

#1
I have downgraded my 75g into a 29g biocube. My biocube does not have a drilled sump so between the sump and the display I have a lot of extra live rock. I have plenty of stuff growing on the rocks that make me want to kill the rock before I either sell it or store it (aptasia, bubble algae, cotton candy algae, different types of caulerpa)
Any ideas?
 
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