myself i would keep waiting some,the tank is 3 months running with mature rock and water but the addition of the rock,and I'm sure there must be the nutrients to feed it(phosphate,nitrate),will stabilize once the fuel it feeds on runs out.conches,hermit crabs i read help somewhat.i had some with the current tank at first but running the sock sure helped for me,you got a reactor with GFO running?maybe there is something other than the rock new you added?