I have elos po4, it always reads 0, i have a hanna phosphorous ulr also and it read 32ppb = 0.098 ppm, I know for a fact that I don't have 0 po4 so I go by the hanna, I increased my gfo and my po4 has dropped to 11 ppb = 0.034ppm so I am inclined to believe the hanna.
__________________
Crap happens, that's why they sell toilet paper in 48 roll packs!
|