I got a new water filter. It does not remove the TDS like the Zero Water filter. I am going to look for another solution for this as the Zero Water Filter is very slow and on my next grow im considering going to the autoPot self watering system so I can rely on filtering 6 cups of water at a time haha. In my tests i had a brain fart and I poured in some water with a ph of 8. This was very dumb lol and of course i saw the tips of the leaves got burned. Also, i started having an issue with humidity spiking and I had to buy a small dehumidifier to help dry things out. I dont see any powdery mildew or other high humidity issues.
I use botanicare products as well and I use 4 stage RO water. I started young plants on 3ml per gallon of cal mag and increase it to 5 max. Just finished my first grow too and that cal mag because of the 2.0.0 caused a nitrogen toxicity in late flower just an FYI. Good luck happy growing!