Quote Originally Posted by smokey420bandit
i've read a few places that the best source of water is to collect rain water.
anyone know of any truth to this?

:hippy:
We use rainwater. We aim for an entirely "green" system...working towards all solar (fricken costly!!).

I don't know that I would say it is the best, as we only used RO for the first crop so not much comparison available. You have to be careful in your collection of the rainwater - barrels need protection from bacteria, bugs, etc.