I just found this post regarding the home testing of Potassium and Phosphorus for people with impaired renal conditions, however most of the focus is on Potassium. I am personally struggling with Phosphorus; this also seems to be significant to the other patients in my dialysis clinic. Aside from getting our monthly labs that show us where are phosphorus is at, it would be very helpful to be able to take periodic assessments through out the month to stay within proper range. I've noticed the pocket meters from LaquaTwin, which look great, however I did not see one specific to Phosphorus or Phosphate measurements. However, I did notice some other potential options browsing around on Amazon. I found a phosphorus meter by Hanna Instruments, it is normally used for check water for aquariums. Although its range is from 0-2.5 ppm. Does anyone know if there is an average ppm of phosphorus in human saliva? I cannot find anything regarding this value. One other thing is that there are also phosphorus test strips for testing water; the range on these vary and are higher. My thought then is I could compare the home test with my monthly serum tests to hopefully draw out a correlation that would be sufficient enuff with the home kit to tell if I am high phosphorus and need to actively make firther adjustments to my diet.