dwc 3x20l pots
has two months to rain
destilled/deionized water (for iron & car battery) that you can find @ any super market is good?
1700 umols^^
What the hell is that?
parts per million is how hardness is measured
Personally, I change my RO membrane before 50ppm
Who knows what third world country mineral suppliers buy from (or whether there is a safety standard) then sell to our municipalities
No matter what method you choose to grow mmj with, if your water is 1700ppms, you need a powered commercial grade RO with multiple 2ft membranes= $$$$$$$$$ so, you will need to buy a lot of bottled water. Many companies deliver in 5g jugs
The difference in cost between purified water (filtered)and RO is probably not that much