Hoping you read this before treating with Cupramine!
I'm guessing you know copper will absolutely wipe out shrimp and can be absorbed by your rocks and such. If you have already treated, I would be hesitant to use that tank as a shrimp tank for a while. I mean, the glass box itself will be fine, but everything in it should go. I would probably toss any substrate, rocks, and hardscape for good measure. Going forward, avoid copper if at all possible. A few assassin snails will make quick work of planaria in a small tank. Even draining the tank, adding boiling water to the gravel, draining again and then letting it sit dry a few days should be enough to kill them all. Copper is just so hard to remove and so deadly to shrimp as to be of little use in shrimp tanks.
Nothing good happens fast in an ecosystem.