get rid of ro water creates issues waste of time, I use to use rain water ( for approx 6 years), works well but issues with calmag and heavy metals from commercial buildings within 30 kms- water was tested and was not good( lead/arsenic just to name a couple),. Tap water - I now fill 6 - 44 gallon drums with tap water and let sit for 3 days to allow chlorine to dissipate . bonus is has cal mag in it and... use it for indoor/outdoor gardens and grow rooms , on a side note- remember we are going a weed, it takes approx 3-4 months seed- harvest, people need to stop trying to re-invent the wheel,all the info to grow is out there and readily available, the worst thing about all this is the dickheads that ask questions and they think they know the answers to and wont listen pushing a narrative there favorite sales rep has spun them - normally dumb arrogant growers that think they know better .... just my views - will go and tie some fishing rigs for tomorrows trip