I just picked one of these up and tested it against my Hannah alk test and api calc test seems on point on those two tests. I have both api master kits I dont get the hate they seem to have garnered since I was last in the hobby. As everything I have been able to compare them to seems on point. Thats not the point of my post though. I dont have another brand of mag test which is the reason along with calc for getting this kit. After my issues with a bad batch of salt or whatever is going on ( no real answer) I really dont want to take it for granted stuff is right. Anyone got input on these test kits?