uv lights

Should we be turning UV light off when dosing amino acids like acropower and if so, for how long ?

Did reefers in the Early days of modern Reef aquarium’s deal with Dino’s and/or Cyano? If so, what did they do to remedy the issue? Asking this question because I think Metal Halides were eliminating a lot of the common reef ugly problems. I’m wondering if the producers of UV sterilizers...