I said undecided, and here is why.
I am by no strech an expert when it come to SW. SO please don't blast me for this post.
I had a 100 gal FOWLR in 92-96. I used crushed coral, live rock and 2 HOB filters. I also had a cheap 50 dollar skimmer. I was having several problems with the water quality, and ended up with a 36" UV. It cleared up all the problems, and I did not see any problems start because of it. It did not however stop any fish related illness. And I had a few of them.
I am now running a 75gal reef (reef used loosely) tank with only LS, LR, and a high quality skimmer. I have had no issues with water quality ....Yet. Nor have I had any fish illness. Just jumpers
I am sure my time will come. But the main difference I have found this time around, is the ability to get on the net and ask questions. Before I just went to Gunther the fish guy and bought whatever he told me to buy.
So, I think that UV sterilizers have their place, but it will be one of the last things I put on my tank. I will try to let one of you guys/gals solve my problem. I would rather put in some work into solving the problem than throw another product and a bunch of money at it.
Cheers,
Al