Low Flow Pump for UV

[BobL]

I'm going to add a 25 Watt UV to my Red Sea 170 and because of the small tank volume, I'm having trouble getting/finding a low end flow rate pump. According to my calculations, the total tank volume is 43 gallons (34 display and 9 sump). For algae looks like I need a flow rate of 205 gph. That's not the issue so much but if I want to slow it down for parasites I need 65 gph. I am looking at a DC mighty Jet Mid Size A10 DC pump rated 538 gph (3x - 4.5 x tank volume) and I'll have a 4-foot return to the main tank so I know I'll lose some to head pressure.

What I want to understand is if I can reduce the flow rate low enough to get to the low flow rate with the DC controller because someday I might need that lower flow for parasitic control. Considering a gate valve but worried about pump strain dialing it down.

Can I dail this pump down to that low flow?

Thoughts and comments are welcomed. UV is on the way so need to catch up.

Thanks

 

[Vinny Kreyling]

How about an Eheim, their pumps can handle a valve no problem.
The model 1200 is about 300GPH & max head of 6' so that may even be too small.