Folks, if you've recently upgraded or renewed your annual club membership but it's still not active, please reach out to the BOD or a moderator. The PayPal system has a slight bug which it doesn't allow it to activate the account on it's own.
Use kalk in your ato...works for me.
You would need to dissolve the calcium media like @ecambero mentioned in order for it to work. If your going down that road you're gonna need a calcium reactor
I found this from @saltkreep88
The recipe is
Vokda: 375ml (40% abv, 80 proof)
RODI: 125ml
Vinegar: 500ml (5% acetic acid). Then follow the red sea nopox instructions.