That’s exactly why I don’t use those ro stations….I don’t trust that the maintenance has been done on them…Damn i just checked the "RO" water i brought back from walmart, its just tap water same 244ppm 7.5ph as my tap. I guess i know which walmart to avoid and i'll bring my pen next time since no1 is testing the water ; / it was only 15 gallons so i won't cry for a refund :smoking: i just hope the plants can deal with it until i get them fresh water that they like so much.