Must be going around this week; I had a green "japanese" BTA decide to do the suicide-by-tunze trick night before last. It wasn't terribly big, maybe 5" fully extended, but I was surprised that between filter sock (in the sump, not on a powerhead) and skimmer the tank went from fairly cloudy back to totally clear within 2 hours, and none of the the other livestock in the tank (fish, two other BTAs, LPS and a bit of SPS) seemed to have any ill effects.
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