Got some good news and bad news.
Good news is I soaked my new dry rock from reefrocks.net in RO/DI water for the last 48 hours with a mag 9.5 circulating the water. Just tested Nitrates at 0 and Phosphates at 0 using the Hanna checker. Checked the RO water which started at 0 TDS and is now 56 TDS. So this rock is pretty clean and and probably doesn't need any treatment.
Bad news is I tested my old rock that I have been keeping "alive". That came back off the charts
phosphate at 1.37 ppm
nitrate at 4-5 ppm
I noticed a lot less life in the container as well. Just a few asterinas, couple dead pods, and no more brittle stars. Even that yellow sponge is noticeably receding. I guess that would explain elevated levels if that stuff has been dying off more recently.
So I am not sure what to do with this old live rock. My options are to kill it, treat it, and start over with all dry rock and get a couple of good live pieces to seed everything....
or
Put it all in the same container with new saltwater. Start cycling new rock while saving the life on the old rock, treat with seakleer to reduce phosphates in old rock.
Any suggestions would be appreciated