8 gal Hygger with resin rock back drop

[Richards Aquarium]

Hi,so I was gifted the tank attached. It says the back drop is made with non toxic resin. I can't find the actual resin it is made of . I wanted to use it for my QT. But I don't know if the back drip will absorb the coppersafe. I was wondering if you had any info on this. I do know the reviews say people are keeping marine fish in it. I reached out to hygger but have not heard back from them.
Thank you Richard.

 

[Reefing Madness]