What's left after Kalk is used up?

Charlene

Certified Reef Fanatic
What is left over after all the kalk is used up? Just wondering from a chemistry standpoint. Is there an inert powder or residue? What is it or will it all eventually dissolve?
 

ReachTheSky

Active member
It's mostly calcium carbonate, undissolved kalk powder or impurities that were in the powder used. Some of it might dissolve if you keep using it.
 
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