I've checked it daily about 2 months ago and my cal and alk stayed the same from my week to week water change so I wasn't dosing all!
Fri I tested and my cal was a tiny bit low and my alk was also low so I added 2 part
Tested sat cal was fine alk still a hair low I added a little 2 part so I'm gona test today and the next few days to see how much each part is coming down daily