I keep thinking about doing that (starting up the CO2), but there is no algae and the plants are beautiful so the only effect would be that the plants might grow faster. I don't need any extra maintenance so I am just leaving it as is and trying to sell the CO2 system.
Actually, I'm sort of leaning the other way lately. I am going for low maintenance, low tech, low light and seeing how easy this can be! My technique is to use easy plants, hardy fish, and lots of diversity (snails, shrimp, frog, loaches, etc). For the last few months I've done maintenance exactly 1 time per month (huge w/c/) and the tank is ship shape!!
"The fewer our wants, the nearer we resemble the gods." — Socrates