LOL WHAT? ... Are you having a joke? Seriously?
How did he do more good than harm? By removing hair algae?? Hair algae is just unsightly - that is it. So he's possibly killed off his live rock (as well as wasted money on buying it live at the time presumably) just to remove it and this is doing more GOOD than harm?
Secondly do you even know how a cycle works? ''take some of the rock out of the tank and let it dry and put it back in so my BB colony has something to do'' I don't know where to start with that lol....
edit; I'm not an 'pro' by any means but a little basic knowledge and some common sense should prevail here
Jesus, Don't get mad...