Actually just iodine. I used it with a vengeance to sink all new corals including LPS, SOS and softies. I even dipped an anemone with a bubble tip which did a great job. It was just closed but reopened immediately. This is a softer dive and should not be used, if you think there are indeed vermin in there, a more intense dive (like Bayer) should be used, it will not kill their tormonts or similar, you still need to isolate corals!
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