very interesting.....but it also mentions that the corals trap and grow the bacteria needed........therefore if the u.v light is on a timed cycle......it can only do good in removing the unwanted bacteria........(also taking into consideration the production rate of bacteria )....being at times, a few thousand times per hour,
aswell as being a major team player in the eradication of fish diesease causing bacteria's (odinium / whitespot)etc.......
the article aims more at other formes of bacterial removal methods as stated on the last few paragraphs................
again.......as with lots in this hobby......some people do things one way........others another
however very informative article
thanks