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- Jul 25, 2014
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Where could mercury be coming from? I have no thermometers in the tank besides my Neptune apex. I run 6 stage rodi unit?? Any ideas?
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What values did you get and are you noticing any issues in the tank? I don’t think we know what level of Hg is an issue.
Using metasorb or cuprisorb may help remove it.
What kind of food are you feeding? If it's fresh seafood, it may have elevated levels of mercury.
I feed same.Just frozen blends.Benereef for corals and nori.![]()
So my last question is, do you run any sort of florescent lighting on your tank?
Almost 6 ppm is extremely high. Tap water is controlled around 2 ppb.
Your Apex temp probe does not contain mercury. It uses a thermocouple.
I'm thinking instrument error
Not sure what a heater with a built in controller might use...I truly hope so. I contacted triton to see. Mercury is just an odd ball to find unles a thermometer broke but I don’t use them
You don't use lignite based carbon, do you?
I ask because in the past there have been incidents of coal based carbon leaching heavy metals out of it (i.e. Kents carbon leaching copper back a while ago)

