Just found this thread.. awesome tank, thanks for sharing the videos and all the information.
One thing I wanted to suggest. If you are using all plastic plants, you might want to think about using a sulfur denitrator instead of UV.
The dentirator will convert all your nitrates into nitrogen gas. If properly sized, your tank will pretty much stay at zero nitrates all the time.
The water becomes crystal clear because there's no nitrogen. Now the downside is that there's a little maintenance with the denitrator.
You need to occasionally open a valve to let the nitrogen gas out. When you are first starting, this is every day. Once you get the nitrates low, it's maybe once a week. Also, maybe 2/year you need to basically get the media out and hose it down (leave a little bit "Dirty" to recycle the system).
This is because the good bacteria that converts the nitrates to nitrogen eventually grows a thick film and clogs water flow.
But I am bringing this up because you were talking about the benefits of UV. I had a UV on, and loved it, but since I have the dentritator, I turned off my UV, and my water is crystal clear. Fish are healthier too because no nitrates. Less water changes necesssary too.
So I think it's a worthwhile addition on any big tank that doesn't have live plants, if the budget allows it. I found a used Korellin one on ebay pretty cheap. There's always people getting out of the reef hobby.
Anyhow, UV is fine and good, just something to think about.. Not many people use these, I love them and am stealing your thread to talk about them

GReat tank again

Watched every video and loved it.