It is only out of ignorance that people use tap water. The typical argument being 'it already has minerals in it'. Minerals are added at the water treatment plant to balance the water going through miles of pipe. But for the cannabis grower, in what ratio and what quality? Lowest bidder wins. This is no place to play russian roulette
Besides you should not be cooking, drinking, or even showering with tap water without filtration. I use a filter in my shower, and RO for cooking and drinking, oh, and of course mixing nutes
A really good RO is < $300. So no excuses
Mine is an iSpring with a booster pump
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