UV and bleaching?

[jcates]

Ya we need nitrates for sure. Salifert NO3 is the best kit imo.

Nitrate 10 ppm on Salifert today

 

[piranhaman00]

Nitrate 10 ppm on Salifert today

Try to achieve 5ppm NO3 and 0.05ppm PO4, I’m still saying bleaching from low PO4 and high alk, slowing drop alk to 7.5

 

[jcates]

Frags till dying. Slowing bringing alk down. Whatever is causing this seem to go from one frag to the next. Meaning one will RTN and the others look fine the next day it's a different frag. Very frustrating. I am running ROX cardon as well in case something got into the tank I am unaware of. Is there a possibility of a pest or something? I do have a melanurus wrasse in the tank