Quote:
Originally Posted by Blue Ridge Reef
It isn't communicable. Why it can happen in numbers at all is a mystery. I have to think there is a "poison" that triggers it, similar to "brown lung" in coal mining, except in the aquarium. My guess would be that it's a substance we hobbyists don't test for, though.
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Could this mystery "trigger" be extremely high nitrate levels? That is what I had in my tank,and the only thing that I could associate it with.