Hey what's up guys, I got a few questions about hydro. So so far I think I'm doing pretty good, I have 7 plants in a 35 gallon tub..I kinda messed up by mixing different strains together. But owell...lol...so they are about 4 weeks old. About 6-8 inches tall. I noticed that when I first started in they were seedlings I was giving them too much food, like 200 ppm...but they took it and didn't start showing signs of something until about 2 weeks in. They started getting some rust spots, and I thought it was from over nuting. Because some had the eagle claws showing and others just had the spots. But I'm also using reverse osmosis water, and I wasn't using calmag with it. So I have now dumped all my water and filled it up with fresh plain ro..water...I'm gonna do a flush for 24hrs..then give them proper dosage of nutes, like maybe 300 ppm to start. I'm also using hydrogen poroxide..root stimulator. ..and gh flora series nutes.some of the leaves were fading into yellow a little bit...which I figured is from not enough nutes..but then again my nutes was 360 at the time..so maybe it was from not having calmag...in the ro water...any suggestions from the pros out there???????