alkalinty

So I’m confused and need some help I have a mixed reef tank softies/lps and I have been testing my alkalinity each day for 7 days to try and figure out how much to dose each day, I am using the Hanna alkalinity checker so it’s pretty accurate, my problem is it’s staying the same I have no drop...

I’m having a bit of a head scratching moment I’ve tested my alkalinity and with 3 test kits and are all receiving different numbers... I’ve just purchased two new test kits Hanna Alkalinity Checker and it tested 194ppm Which is 10.8 It confuses me since the I just bought a new Salifert...