UV in 120g FOWLR

[swordstool]

I have a 120 gallon FOWLR and am running a 18W Coralife Turbo Twist UV Sterilizer. The tank has been up for about 3 months and things are going fine. Recently I've read that many people only run their UV half of the day or just while the lights are on because beneficial bacteria come out at night that the UV would kill.

Is relevant to a FOWLR, or just a reef tank? Any opinions on running time for UV in general for FOWLRs?

 

[swordstool]

Currently I run the UV 24/7.

 

[TheTodd]

I will let people currently running UVs answer more, but BB are on the rocks and sand, not circulating in the water, so I would imagine they would not be touched by a UV. I used to have one on my reef tank (many years ago), but a lot has changed since then.

 

[CorallineAlgae]

It isn't bacteria that come out at night but zooplankton. In a FOWLR tank you shouldn't worry about it. If you like using a UV it's fine to run it 24/7. It won't do anything bad to your BB day or night.