I started using the uv's just over a week ago. As soon as they came on I saw colours that were simply missing before. Foe example, purple tips on my two elegance corals, deeper greens on zoas. The whole tank looks much crisper / sharper.
I have the Illumina sr1200 and installed two uv's. This is the perfect number for that size. One for every two foot. I have started them off very low, only 15%. You can hardly see them working, they look really dim if looked at directly (not good for the eyes), but the change was massive.
Since adding my yellow hairy zoa type corals have coloured up over the week and look much better now. They are yellow again instead of dirty looking. The elegance fluresent green sections have expanded and the coral is definatley looking happier as are all corals. Nothing apears to dislike the aux pads.
If you are using a vertex these uv's are essential, unlike the reds which are fun but not much more.
I have all my settings low compared to some others
royal blue max 52%
Blue 47%
White 28%
UV X2 15%
Red X2 5% (only used at all because I bought them lol)
My advice is the Illumina without the UV works, but with the UV = "Wow!"
Before anyone asks, "no I'm not a sales person, just a very happy customer!":thumbsup::thumbsup: