I bought a package of some live rock rubble from Marine Depot to pile into my sump (I want a supply of rock for gluing coral). It is definitely not "live" rock (very dry). I know for larger pieces, they need to be cured and the phosphates need to leach out. It doesn't look like there is anything on the rocks that would lead to any sort of ammonia spike. Does the same rule hold for smaller pieces? Could I just add one piece at a time to my sump over the course of months? My tank is 125 gallons with a 29 gallon sump.