Hi all, I'm considering purchasing this unit. My only concern is it looks like it's really meant to control dosing. I want to use my apex and calcium reactor - am I wasting my money on this using it this way? My alternative is going with the trident (I'd benefit to have mag/cal tested too) but I'm not a huge fan of the fixed testing schedule. Does anyone have their alkatronic set up with an apex and carx? What's your experience been like? If this is a go I'll probably get the mastertronic too.