Further update: The tabs did in fact kill the polyps, and a thorough scrubbing with a toothbrush, followed by several filter socks cleaned up the tank nicely. Other than the 2 cleaner shrimp, no casualties. Corals are fine, fish are fine and tank is clear again. Haven't tested for NO3, I think my kit expired in 2006, so I'll just watch the corals.
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Brad
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