Copper @ 290.5 µg/l per ICP

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ScubaSkeets

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Hi folks!
I recently got my ICP results back and it shows copper @290.5 µg/l (.2905 ppm?).
I am wondering how accurate this is and if so, how bad is that amount. I have never put copper in this tank, but however it got in there, could it be the reason why my corals were not doing very well. Once I got the results, I put a bag of Cuprisorb in the sump, and the corals are starting to bloom. I know any trace of copper is detrimental to corals, but is 290.5 µg/l a crazy high amount?
 
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Jay Hemdal

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Hi folks!
I recently got my ICP results back and it shows copper @290.5 µg/l (.2905 ppm?).
I am wondering how accurate this is and if so, how bad is that amount. I have never put copper in this tank, but however it got in there, could it be the reason why my corals were not doing very well. Once I got the results, I put a bag of Cuprisorb in the sump, and the corals are starting to bloom. I know any trace of copper is detrimental to corals, but is 290.5 µg/l a crazy high amount?
For ionic copper, that is higher than the highest therapeutic dose (.22 ppm). This would kill all of your invertebrates and possibly some of your fish. I see two options; the test was flawed, or there is residual bound copper in the system (like Coppersafe or Copper Power). Even then, that value would be 10% of a standard dose and you would know about that, as you would have had to coppered the system at some point in the recent past.

My bets are on a testing/reporting error. I would contact the company to see what they think. My understanding is that these firms use batch standardizations, so if the device wasn't calibrated properly, they should be getting all sorts of customer questions.


Jay
 

Randy Holmes-Farley

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If not a top tier ICP company, and if they do not reply that it may be an error, I'd suggest a repeat test with a different company.

FWIW, I don't consider 0-15 ug/L copper to be a clear problem, but yours would likely be be.
 
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Thanks for the replies. It is ATI Labs test. Again, there has never been copper put in this tank. I put a Poly Filter before I put in Cuprisorb in the sump and it did not turn black to indicate copper. However, once I added Cuprisorb, the corals started to look better. I will contact ATI to see what they say.
 
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