Take a look at the thread I just posted about RTN in some frags.
http://www.reefcentral.com/forums/showthread.php?t=2602256
Now that I think about it, I did start to switch over from Instant Ocean to Red Sea Coral Pro right before the RTN started to happen but like other people in this thread, I don't really see anything out of the ordinary in parameters, other than slightly elevated NO3
http://www.reefcentral.com/forums/showthread.php?t=2602256
Now that I think about it, I did start to switch over from Instant Ocean to Red Sea Coral Pro right before the RTN started to happen but like other people in this thread, I don't really see anything out of the ordinary in parameters, other than slightly elevated NO3