Jim, what are your current water parameters? Specifically, what's the daytime max temp, nighttime min temp, specific gravity, pH (mix/max over a typical 24hr period), NO3, ammonia, etc.?
Last time I battled ick on a tang, it was on my recently-introduced red sea sailfin tang (almost 2 years ago). I checked the above parameters and found my SG to be 1.027... I lowered it to 1.025 as well as soaked my nori in garlic oil (from the garlic pills you can get at the grocery), and the ick was gone within a week.
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-- Tony
My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee!
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