Id love to see what RODI systems people are using for water in their hydroponic rooms. Tell how much they cost and why you like it. Maybe some numbers on the water it produces, ease of use, and portability.
not to be a wise guy,but I use rain water.ph7 and 30ppm.it does get hard if you need a bunch,but my requirements are less than 50 gallons per week.
I am searching for a r.o unit,so I will observe the answers given
I also use a Bulk Reef Supply RO system. I have the 75 gallon per day which is more than enough for my needs. It's not portable (although they do sell a portable version) My Bluelab PPM meter doesn't show any reading at all in the processed water.