I have kinda a newbie question. I tore down a 90G cube with 100lbs of Live rock with a TON of hair algae. I also have 65lbs of dry rock that has been sitting in my garage for about a year. I will be setting up a 65 rimless and have a question on what rock to use.

What would be the better path to take? Cure the algae filled rock or start over and cure the dry rock. Or I guess the real question is...do i fight the GHA on the live rock or fight the PO4 seeping from the dry rock?