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Originally Posted by gregzz4
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quick summary. 1 tab per 100g, kills all soft coral and cleaner shrimp. some fatality with crabs, all mine were fine. I did lose a bunch of pest snails, but turbos and astreas were ok. Left it in for about 48 hours, then added carbon. Scrubbed all rock with toothbrush, changed about 100% water volume over 5 days. So far, no return of the damn things!