Shelley, I'm right in the middle of setting up a 50g custom breeder tank for frags. It's probably very close to your tank. I'm going to have 400w radium(s) over it, but if I were going to use the Sols, I would set them at 100% all three colors at 12 inches off water line. Too white for my liking on the 180, which is why i only have it at 90 there. Not sure what else you have in the tank, but SPS can take pretty much whatever you throw at them. I have 2 large euphyllia in my tank and they also love the light and are thriving. No direct feeding on them either.
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Brad
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