My tap water has a ppm of 108, is that suitable for medical cannabis grown dwc? Sent from my SM-N900T using Grasscity Forum mobile app
Mines 220. I filter the water through a Brita system to remove solid particles and let sit for 48 hours so chlorine can evaporate off. Sent from my C6606 using Grasscity Forum mobile app
108 is very good, you shouldn't have any problems with that. Mine's 50 but that's pretty exceptional really
250 ppms here. Only use it for flush and top off res. Filling res/clones use reverse osmosis . See if you can find an "aquamart" water machine near you 25 cents a gallon get 2 5 gallon jugs make a trip to fill them up once a week. http://forum.grasscity.com/index.php?/topic/1234402-Budget-DWC-CFL