I had my fluval 3 running a powerful stream 24hours a day for as long as I had the CO2 system in, it didn't help. Maybe there's something funny about my setup, my water, my fluval, whatever. I doubt I'll figure it out, it might be an overreaction to junk the CO2 system but after the scare I had I don't want to risk it again. My plants were doing OK before the CO2, I only added it as an "extra" to improve growth and I never actually wanted a planted tank as such. So I'm not annoyed about getting rid of it, if you know what I mean.
Thanks for your thoughts though...