I've just finished a new build on a 400 gal tank. Total water volume is around 500gal. For the past year and a half I've had some fish and corals in holding tanks in my basement waiting for their new home. They moved in to their new digs last week. I can't understand why there would be such an increase in alk demand for the new tank when I have the same number of animals as I had before. Kalkwasser additions by itself was sufficient to maintain my alk and calcium levels. Now I'm trying to tune in my calcium reactor plus I'm dosing Alk to keep up. Any explanation? Could it be precipitating on the new sand and rock?