02 solution?

They are also now getting brown rust spots on some of the leaves. I think its because I doubled my kool bloom in my top off water.
DrGreenBean Reviewed by DrGreenBean on . White Rhino, NLxHaze Serious Yellowing! Please Help Hi, Im helping a friend with a setup I made for him. For some reason there is a bad yellowing problem. This problem has been here from very early on as seen in the last photo. Early on we tried to treat this with calmag + I normally don't post much and searched and searched with no results similar. -These were flowered early, like 6-8" then 12.12. -White Rhino x2 & Northern x Haze -GH 3 part Lakewood Formula, on 0,1,2. 1200ppm total 6 gal -Brita Filtered water ph5.4. Could Rating: 5