starfishguy869
Active Member
I recently bought a fresh tub of seachem kalkwasser and when I was mixing it up, I saw something weird sinking at the bottom of my container, they were weird black specks that resembles sand (picture below). I decanted the liquid off and poured the specks into a measuring cup. When pure hydrochloric acid was added, the solution turned green and I could tell that my kalkwasser wasn’t pure as when pure calcium hydroxide was added to hydrochloric acid, it should be clear. Are these specks normal?
After addition of HCl:
After addition of HCl:
