dougsko

It depends on the size of the system. For something small like the water bottle I used, you should probably change the water every few days.

Hey, i saw a post about a mini DWC system. I've tried to make it once but i hadn't read anything about. I saw yours and thought it useful. The only question i have is: how often do you change the water? I can't afford a EC meter or a PH meter...
Thank You!