Copper in oysters and other seafood

[Levinson]

I sometimes feed my invert-only tank with frozen oyster bits and my shrimps, crabs and others seem to love it.
But I read online that oysters are quite high in copper content which got me worried. Some say 1.3mg per 100 grams, others say 7mg per 100 grams. I don't know which is right but it is generally considered to have relatively high copper content. I also read bivalves often tend to have more copper in them compared to other seafood.
Is this something I should be worried about? Could copper in them accumulate in the tank over time and harm the critters? Should I stop feeding them oysters?

 

[Dburr1014]

No worries

 

[Randy Holmes-Farley]

Some seafood is high in copper. I covered this in one of my articles. But it’s not typically a problem.

https://reefkeeping.com/issues/2003-04/rhf/feature/index.php

1).

Table 1. The copper concentrations present in certain shellfish.
​

Food​	Copper Concentration (ppm wet)​
Fish​	0.61​
Scallops​	0.27​
Clams​	6.1​
Crab​	7.4​
Shrimp​	1.8​
Oysters​	2.9​
Mussels​	4.8​
Lobster​	37.0​

 

[Levinson]

Some seafood is high in copper. I covered this in one of my articles. But it’s not typically a problem.

https://reefkeeping.com/issues/2003-04/rhf/feature/index.php

1).

Table 1. The copper concentrations present in certain shellfish.
​

Food​	Copper Concentration (ppm wet)​
Fish​	0.61​
Scallops​	0.27​
Clams​	6.1​
Crab​	7.4​
Shrimp​	1.8​
Oysters​	2.9​
Mussels​	4.8​
Lobster​	37.0​

Thank you Randy!

 

[Levinson]

Some seafood is high in copper. I covered this in one of my articles. But it’s not typically a problem.

https://reefkeeping.com/issues/2003-04/rhf/feature/index.php

1).

Table 1. The copper concentrations present in certain shellfish.
​

Food​	Copper Concentration (ppm wet)​
Fish​	0.61​
Scallops​	0.27​
Clams​	6.1​
Crab​	7.4​
Shrimp​	1.8​
Oysters​	2.9​
Mussels​	4.8​
Lobster​	37.0​

Thanks for the good read.
After reading your article, I feel it might not be an issue. I run an ATS so algae will help out with the export.
Also, there's activated carbon, although I don't change it very often but I can if I need to.

I wonder if the inverts ingesting food sources containing copper could be an issue. I read somewhere that many inverts have ways of pushing copper out of their system after consuming them.