Hey DGC, I am a very new grower currently on my second seedling run. I had an RO system put in prior to wanting to start growing. My RO system seems to be operating fine and when i test the water it always comes somewhere in the 5-10 range. I recall an episode when dude was killing his plants with soft water because of the salt. My question is is it killing my plants with 5-10 ppm of salt? My RO filter is hooked up to a soft water line which would make all those ppm salt right? The episode i remember Guru had mentioned 100ppm of salt is even enough to kill plants. Is 5-10?