UV on a closed loop

[Reefer911]

I'm planning on running my UV on a closed loop and I am wondering if I can change the flow rate every 12 hours for parasitic control and algae control. Would only 12 hours/day be effective for either application?

 

[BaliReefBox]

why not just leave it on the slower flow rate and achieve both at the same time..

 

[Waters]

I'm planning on running my UV on a closed loop and I am wondering if I can change the flow rate every 12 hours for parasitic control and algae control. Would only 12 hours/day be effective for either application?

Yes, it would still be effective, and yes, it can be done. Unless you have a large tank and undersized UV I am not sure why I would bother though (unless, like I said, you need to speed up the flow to filter a larger amount of water).

 

[Reefer911]

why not just leave it on the slower flow rate and achieve both at the same time..

Different flow rates achieve different results, at least according to everything I’ve read