does saltwater coppersafe expire ?

[kokosnood]

Hello,

I was going thru a bunch of old aquarium stuff, and found a full gallon of mardell saltwater coppersafe. It's worth like $70, and I was wondering if it ever expires. It's about 10 years old.

Thanks,
Stefan

 

[dwilder]

age has an effect on most meds not sure about coppersafe

 

[Lupin]

Just throw it away. You wouldn't try risking your fish especially with copper, would you?