LOL, thanks Catherine
I ended up trying the 4N sodium hydroxide route. Works like a charm and I've gone on two killing sprees so far with a third scheduled. I just kill them as I find them and a couple rocks I have just removed from the tank and either removed the majanos manually or doused them liberally with the sodium hydroxide due to the sheer numbers of majanos on them (there are only a couple rocks like that with 10+ majanos).