I recently tested the water in my hydroponic rail system to look for possible contaminants from PVC or other materials I used to build the system. These are the results!

See this article on our website for more info on PVC including some helpful research I found:
https://www.simplegreenshydroponics.com/pvc

FREE guide on building a rail system:
https://www.simplegreenshydroponics.com