I do not believe there is anything to drop.Hi yes, same material.
there was a few positive readings Vit C dropped a little amount of powder
I've had to recover again with Al.
back to square one.?
Will drop with smb today. powders hcl and bleach and stannous
Add a splash of HCl and cement out what is there on Copper.
What ever of value is there will come down then.
You have been making a increasingly bigger mess of the wrong start you had.
Nobody knows what is in there at all now.
So if you cement it out you can start fresh.
Then bag your stuff and start over with fresh feed stock.
When you feel proficient you can start treating your waste.