are you using a new EC pen or the same one?I'm have a RO system in my house. 6.5ph and 0ppm/0ec
not sure what else to say about itThey swapped out my old one for a new one when they tested it no questions asked. New one reads perfect in the calibration solution for 500ppm, 700ppm, and EC
Yes I have ec 500ppm and 700ppm. It's a bluelab pen. http://www.getbluelab.com/shop/By+Category/Pens/Bluelab+Conductivity+Pen.htmlnot sure what else to say about it
don't know why your getting such high readings
so you can switch the pen from EC to PPM?
try switching the setting of the pen (if you can) to ppm and test your solution again
what brand of ec pen?
Nice plants satorie and querkle are good strains
You are teaching me a lot about nutrients and their interactions with plants and substrates.ive been chasing the ph drift im my test samples of the waste water
having to water heavy every few days to bring the medium ph back down to what the feed solution is 5.5 (medium solution tests almost 6.5 after a week)
so next time I mix a batch im going to raise the EC and see if it reduces some of the swing
really?You are teaching me a lot about nutrients and their interactions with plants and substrates.