DIY Rock (oystercrete) curing??

[blacknife]

i tried putting some of my diy rock that i thought was stabilized in my nano. not much just a bigger piece or 2. I had a powerhead incident that blew half the water out of the tank and the heater really heated up the remaining water and the ph went through the roof. back in the bin went the rock.

I wonder if cooking up the heat on it would speed up the ph leaching