I have a uv
in my tanks....love it!!
will not hurt your bb because bb isn't suspended in the water, it attaches to rock, filter media, plants ect.
I had algae blooms in my water and no amount of chemical or tank darkening would clear it up, so as a last resort I bought a uv
....best investment ever! I only run it when I have too and now that my tank is balanced I've not had to use it in about 6 months.