Flow rate through uv?

[loweryphil]

I have a vecton 600 plumbed directly into. My return pump a tmc reef pump 8000. The manufacturer says the maximum flow rate should be 1,900L an hour. I have a 525L system so this would work out at 3.6 times tank turn over an hour going through the UV, but my return power out of the return nozel seems weaker than this? Is there a way to tell how much flow I'm putting through it? I have it set on level 4, as 20 would be 8kL 10 would be 4K so by setting it to 4 I think I'm in the right area? "

Can anybody advise me further?
I'm running it to tackle osteo dino.

 

[loweryphil]

Bump