Advice on QT shutdown?

[Midway]

Hi there,

I have a QT with a couple of fish but those went into my DT tonight. Now I have sand and LR in there. I have been treating with cupramine for a couple of weeks. Fish were not sick I bought from the store and treated them with cupramine.

What should I do the LR and sand? I don't think I'm bringing more fish from the store anymore. I have been running carbon for a week now to remove the cupramine from the QT. So is it safe to put the LR from the QT into the DT's sump? after treating with cupramine? is it safe for my corals?

Let me know you're thoughts please.

Thanks for reading my post.