id the problem

I have a copper gold hammer that’s unraveling. It’s next to another purple orange hammer that’s doing well. This been going on for about two weeks now. I plan on removing it and dipping in witch hazel. PH 8.4 ALK 9 Calcium 475 Mg 1500 Nitrates 5 Phosphate 0.1 It’s getting about 50 - 75 PAR...