Hammer Dying

[ReeferTang44]

Those are my levels and the first picture is of how it looks now the second is what it use to look like. I have not change flow lights or anything I’m thinking it could be mag not sure please help ( and this is the only coral that’s like this and I have many hammers frogs and torches.

 

[ReeferTang44]

Please help

 

[Uncle99]

MG, I agree with you too low, bump to 1400ppm ish.
There would be an issue with Phosphate at .9ppm, is this a typo because I would think that you mean 0.09ppm which is great.

Nitrate high as well, need to bring that down to 5-15ppm.