Montipora turned white and bowerbanki skeleton showing

[Fishtalk24]

Hey guys i have had montipora frags for about 3 weeks now and i cant figure put why they continue to bleach or dont regain color. Also, my bowerbanki frag began dissoving and exposing skeleton about 1 week ago now. I will admit there were some swings in the early stages of introduction due to dosing by hand. Now i have a dosing pump which is keeping everything close to stable. Any thoughts on what i should do to preserve these montipora and bowerbanki frags ?

Levels:
phosphates 4ppm
Alk 8
Nitrite 0
Ammonia 0
Calc 440
Nitrate 5ppm
Mg 1350

 

[WIReefer]

Did you mean 0.04 for po3? Or is it 4?

 

[Fishtalk24]

4 based on coloration API test.

 

[DeniableArc]

4 based on coloration API test.

The api test kits are notoriously bad
Do you have any photos? What lights do you use? If it were 4ppm that would be very high

 

[Fishtalk24]

Kessil a360

 

[Fishtalk24]

See attached

 

[Bleigh]

Hey guys i have had montipora frags for about 3 weeks now and i cant figure put why they continue to bleach or dont regain color. Also, my bowerbanki frag began dissoving and exposing skeleton about 1 week ago now. I will admit there were some swings in the early stages of introduction due to dosing by hand. Now i have a dosing pump which is keeping everything close to stable. Any thoughts on what i should do to preserve these montipora and bowerbanki frags ?

Levels:
phosphates 4ppm
Alk 8
Nitrite 0
Ammonia 0
Calc 440
Nitrate 5ppm
Mg 1350

Phosphates jump out to me too. But seems unlikely to be truly that high if the nitrate is truly that low. Where is it in your tank and what is the flow like?