PadawanWarrior
Well-Known Member
This one?I have two soil ph pens from blue lab and I calculate the P ppm from PH down within the P2O5 to get a better NPK/CA/MG ppm ratio every through Excel
![bluelab.com](/proxy.php?image=https%3A%2F%2Fbluelab.com%2Fmedia%2Fcatalog%2Fproduct%2Fcache%2F4a475eee0f7ea9ce633e9cb2e14115be%2Fb%2Fl%2Fbluelab-soil-ph-pen_pensoilph_1.jpg&hash=7e6628be95cafe5fc0834b5e8006221d&return_error=1)
Bluelab Soil pH Pen
A hardy handheld solution for measuring soil pH and temperature on the go Effective in most growing media and in water/solution Fully waterproof - not just water resistant Industry-leading one-year warranty for peace of mind Hold reading function to capture measurements with ease Simple...
![bluelab.com](/proxy.php?image=https%3A%2F%2Fbluelab.com%2Fmedia%2Ffavicon%2Fstores%2F11%2FBBB.jpg&hash=43975ddbef879a2b215b95499aabc87f&return_error=1)