recovering

Hi, Two days ago I bought a damaged scoly from my lfs, it's my first scoly. My tank is now running for almost 2 years, water parameters are stable (alk : 8,5 NO3 : between 2 and 5 ppm PO4 : between 0,02 and 0,04 ppm Ca : 430 ppm salinity : 1,025 and Mg : 1350) and everything is thriving in the...