Uv light overexposure to fresh water fish will kill them?

  • We are currently upgrading MFK. thanks! -neo
I just recently bought a hamilton uv light and i used it on my flowerhorns, until the female looked like it was paralyzed, then deep blue told me it was the light, so does uv light really harm fresh water fish in this manner?
This has happened to me too. The paralysis n then the mould on the fish. What did you do
 
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