Safe copper levels for new shark

[Jay Hemdal]

So I just test again and now it is over .3. I removed a bag of carbon, and two bags of bio media, replaced the bio with two bags of matrix from one of my reef sumps.

I put a new cuprisorb pouch rated at 60 gallons yesterday yet it is still rising. Going to open the FX 6 and remove any media.

Any other suggestions? And as it was copper power, at what level should I determine this is bad for my shark. I could move him to the DT which doesn’t have any other fish in it, but haven’t fed him yet to know if he is eating.

I do not understand why it is going up as I haven’t changed anything except the water change. The bag of carbon got moved when I put in the new cuprisorb as the older pouch still looked like some was white so I left it in. Does cuprisorb leach the copper back in after a time, should I pull it as well?

Any advice would be appreciated.

Carbon is sometimes implicated in releasing stored copper, I don’t know about cuprisorb. Even still, a water change should reduce the amount of amine chelated copper in the tank by that percentage - if not, then try testing freshly mixed seawater to check for testing errors or malfunctions.
Jay