Okay, but why?
Again, I don't know your locale, but if the area you dive in is free of pollution, and if it's legal to take rocks, then what are you trying to keep out of your tank? Are there pests or algae you're worried about? If not, and this is nice rock from where you dive, then by rinsing it under RODI and then bleaching it you are killing all the good stuff you're collecting! We in the states would do unspeakable things for that kind of rock, right from the ocean ;-)
Either bleach it totally dead and start with dead rock (which I think would be a shame??) or please let us know why your live rock needs to be RODI/Bleached? I'd love to see a pic of what it looks like from the next time you dive.
Again, I think this is why you're seeing a stall in your cycle, in my very humble opinion. You sort of killed half your rock with your bleach, some of it is rotting, but some of it survived. The living bacteria are now trying to catch up, and they will in time.