Thanks guys, I guess I need a way to test my co2 saturation and see where I'm at. I could add another diy co2 for now to see if that helps. I'll probably eventually change over to pressurized. I like "projects" so the diy was kind of fun to experiment with and it has definitely made a difference in my plant growth.
Thanks Ford for the info. When you say lack of nutrients could be part of the problem, what should I try?
I need help with ferts. I have a bunch, but don't know what to use. ???