I felt like upgrading from API test kits to one of the brands you see in the title. I specifically just want to change my phosphate test from the API reef master test kit. So my question is which test kit for Phosphate... and just a test kit in general. Should I fully move to salifert because I already test cal, mag, and alk with salifert and I could just get the nitrate, phosphate, and ph salifert test kit? Thank you for any advice.