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#1
11-11-2011, 10:08 PM
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I don't know if it's the cause but 1.028 is way too high. That's something I've never really understood. Mg obviously affects SG but so do a lot of things so 1.025 from a salt mix and then whatever Mg added to bring Mg in check to that brings up SG, but if it was say 1.025 plus Mg to get 1.028 is that equivalent to simply mixing more salt to get 1.028? More than likely not. So I can't even speculate if that's the cause here. Maybe??
The few things I can think of on top of what you have already looked for: - copper (take a sample to an LFS maybe and ask them to do it) - temperature swing - O2 deprivation (likely not -- usually fish will go first if that were the case -- but, something to think about nonetheless) - some other kind of toxicity to the tank. Detergent, soap, .. Or it could just be a small enough ammonia cycle and the test kit just didn't catch it (it happens).. Good luck sorting it out!!
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-- Tony My next hobby will be flooding my basement while repeatedly banging my head against a brick wall and tearing up $100 bills. Whee! 
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#3
11-11-2011, 11:36 PM
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Quote:
 Actually, chemical engineer, but close enough.
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#4
11-12-2011, 03:56 AM
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I just set my tank up around a month ago and did a small amount of rock transfer from my holding tank. After the rock was in I started to notice my brittle stars coming out the rock and falling to the sand dead. I had done a cycle and all was normal. The only thing that I think it might have been was when I glued my plumbing together I didn't leave it long enough to dry before I put water through them. Have you done anything like this?
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206 gal tunze centre overflow star fire front illumina 260 Loudest part of my system would be the nagging sound I hear on a regular basis about how much time and money I spend on the tank.
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