Oh I ran 2 grows the first was so good I was ready for another, and it was a nightmare. pH was all over the place. Didn't matter what I did. It would either rocket out of control or crash so hard I had to get a new meter just to be sure it was an accurate reading! There was a week towards the end I had to change out the water 3 times at about 40gals a throw gets expensive, , RO doubly so. But in the end they made it so I am exploring other methods. I may end up back in dwc because it does work really well just the bad experience fresh in my head has me steering away for a time.