So it looks like there are people that run denitrators and love them. With that said, there are lots of crack addicts too. Here is what they have to say:
http://www.maast.org/showthread.php?...hur-Denitrator
http://www.3reef.com/forums/general-...l#.UyPtzF6H_aU
Another option for nitrates seems to be mixing kalkwasser with vinegar rather than water when dosing for calcium and alkalinity. I am not sure if this would keep up on large demand systems, but it's interesting for sure.
http://www.reefscapes.net/articles/b...alkwasser.html