Hm. Ok that may be the problem. I guess it will just take some time for the plants to adjust, right? 2 wpg doesn't seem totally unreasonable for diy co2 operating around 10 - 20 ppm is it? I am increasing co2, it's just happening slowly. My 4KH drop checker is finally green, just within the past couple of hours though. The anubias are what's really throwing me, I've had co2 go up and down all over the place and never saw any difference with those plants, but maybe it's just the lighting increase that's pushing them over the edge. I may move them all into the shade and see if that helps.

Would decreasing the photoperiod help for a while?