One of the most likely thing to happen when you soak Indonesian LRs (here im assuming u got your LRs other than CF) in freshwater is this:
1. you kill pests
2. you also kill useful living organisms
3. being Indo rocks, they are more dense and what is like to happen is that the rocks starts to die off from outside towards the inner core.. and when you do not allow the whole liverock to die completely without cycling the rocks, problems is that when u start the system, the rocks start leeching out nutrients which will be a slow ticking BOMB IMO
soaking the LRs in FW is a real suicidal method, unless you were thinking of cooking the LRs completely and that probably would take no less than 6 weeks
just my 2cents