I have been doing 1/16th of a tsp 3x a week on alternative days from the micro nutrients. So, I don't think the combination with iron should be an issue. My tap water comes out at ~ 2.0 ppm, so I am thinking 1/16th tsp should be just fine.

I will look into the CO2 more thoroughly. I have not been changing the drop checker solution bi-weekly as suggested. Also, the lights/CO2 kick in while I am at work. I note a YELLOW color when I get home. Perhaps, the 30ppm of CO2 is taking longer to establish in the tank. I will see about having the CO2 kick in a little earlier or alternating my diffusion methods.

Thanks.