I've tested nitrates in the stock tank with littlenecks several times since adding them and levels have dropped from 40ppm or so to around 10ppm with no other changes. They're all still alive in there and happily filtering away. The ones in my food culture tanks are still alive and happy as well, I don't test those tanks though. The ones in the 'fuge for the 75g reef are all dead but I suspect the big hermit crab that was banished down there of murdering them, when we find a home for him I'll try some in there again.
-Sonja
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TANSTAAFL!
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