lasse, so many triton users report coral staving no3 po4 levels that we're starting to feel there's some carbon dosing built-in triton core7.
we must dose both no3 and po4 or we go to zeros within 24 hours. both our solutions are autodosed. do a search, there are many recipies for both on this site.
keeping proper po4 levels have been our biggest reefing struggle. much harder than alk... and it goes to zero in our frag tank #2 often. this po4 parameter is so critical for us that it literally controls our alk.
our no3 is stable at 10ppm -- we are currently trying for 0.02 to 0.9ppm po4.
we are waiting for ghl to save us lol... iondirector reserved spot @Vinny@GHLUSA
I do not think that Triton have add any carbon source in their Core 7 but a refuge is an important part of the Triton method. In my case - it is probably the refugium that "eat" my NO3 (and PO4) because my NO3 concentration tend to rise every time I have harvest the refugium. A hardcore Triton user do not harvest - but I do. If you have a refugium - one way should be to lower the illumination of the refugium. Run it 8 hours during night instead of 12
Sincerely Lasse