Danny,
Dang, you've got to dumb it down for me to understand
What are CaCO2 and CaCO in actual words?
How did you add the 40ml Ca? By dripping, adding slowly, or dumping it all in at once?
What did you mix the 7 tbs CaCO2 and 1 tbs CaCO with? Did you mix them in separate containers or in the same container, then add them to the tank? Did you add by dripping, adding slowly, or dumping it all in at once?