Help!! my lobo is receding don’t really know the cause

[Niels Verstappen]

Alright something clearly isn’t right my Lobophyllia is receding at an alarming rate, others corals don’t show signs of receding or melting, but they did look a bit more pale than usual, my Staghorn coral tends to have a brown tint, which has me thinking if the nitrates and phosphate play a role in this I tested them today and they where nearly undetectable very close reading to 0 I used Nyos test kits both for NO3, PO4 for livestock besides corals I have one damsel, shrimp, urchin, sand sifting starfish, BTA

 

[naterealbig]

What is your Alk, Ca, Mg levels - and what test kit are you using?

 

[Niels Verstappen]

What is your Alk, Ca, Mg levels - and what test kit are you using?

Alk is 10, ca is 450 mg is 1440, salinity 35ppt, temp a. Nearly stable 25 degrees Celsius, I’m using nyos test kits for NO3 and p04 the rest I use salifert, for lighting I use aquamedic aquarrius 400