Originally Posted by
Floyd R Turbo
Yes I use both of those. Both are great.
Some say the Hanna P checker can give you vastly different results in back-to-back tests. I have not experienced this myself.
There is a Phosphorus checker that measures in parts per billion and then you convert over to phosphate using a multiplication factor (as there is a fractional relationship between phosphate and phosphorus) that test is supposedly more accurate or something. But the grand daddy is the Milwaukee kit.