How to hydroponic 4th edition


#1

Cool book by Keith Roberto illustrates the hydroponic growing process, and includes step-by-step hydroponic systems.
http://www.agriculture.uz/filesarchive/HowToHydroponicsRobert2003.pdf


CO2 range to measure? Looking for an alternative sensor
#2

Very interesting. A quick glance apears very fruitful. I will read more of this later. Thanks