UV recommendation for RSR 250

[Waynerock]

Want to upgrade mine. I have a Red Sea 250 and want to run separate from the return and I have very little room in the sump area. What would you recommend and what pump. Something small not too expensive that I could possibly mount on the inside of the sump area. This is what I am working with

 

[Mastiffsrule]

Hi

Space does look compact. My first 3 thoughts would be aqua uv 15 or pentair 18. Both are still somewhat big, in the area of 22-24 inches. The other would be a corallife 6x 18 watt. Not a big fan of coralife due to an issue with the reflector inside.

Maybe a few other have some recommendations.