a great link for THE IMPORTANCE OF CALCIUM, ELECTROLYTES, MAGNESIUM, AND KH IN YOUR AQUARIUM.
http://www.americanaquariumproducts.com/AquariumKH.html
http://www.americanaquariumproducts.com/AquariumKH.html
so you use baking soda to raise, then wonder shells to maintain? or just buy the buffer and it doesnt need maintained.
what do you do at WC thought? test and adjust all over again?