I've been looking around different forums and watching the BRS videos. I can't seem to find a exact answer to my question. Can I have to little flow in my UV sterilizer. My display is roughly 70 gallons with a 20 gallon sump. I am looking to pump on a isolated loop since my tanks plumbing wont allow me to just add inline. My plan is to only run the UV as a preventative so I would only be running it at night after the lights on DT are off.