Is it OK to dose Vodka and run an UV ?

[ScubaSteve]

I'm with Tim on this one. In the past I would have said it would be counter productive but the more I learn about carbon dosing, the more that opinion changes. When carbon dosing, the majority of the bacteria grow on a substrate of some sort, be it sand, rocks, piping, etc. Comparatively very little of it is actually in the water column. Sanjay Joshi has some articles demonstrating this.

If you are dosing bacteria however, like MB7, I'd shut the UV and skimmer off for a period to avoid just nuking the freshly added bacteria. I think the benefits of having UV preventing disease out-weighs the small decrease in bacteria.

I do VSV and MB7 dosing, though I don't run UV.