I use Hanna Alk, Ulr phosphorus and Cal. I find Hanna checkers to be the fastest and most accurate testers I've used(even the Cal)... One thing that helped with the Cal test is after contacting Hanna they sent me a 0.5ml syringe and a bottle of there deionized water. The smaller syringe helps to get that crappy 0.1ml of tank water and the deionized water just keeps things consistent imo.
Now I want to go test! Lol does Hanna have a marine potassium test? I don't remember them having one.
Now I want to go test! Lol does Hanna have a marine potassium test? I don't remember them having one.


