Thanks The only tank that used CO2 was the big one full of plants....the other two were just ferts. I was using these http://greenleafaquariums.com/products/pps-pro-aquarium-fertilizer-package.html and actually still dose the nitrates into my reef tank when needed. As far as maintenance, it was almost daily lol. Much more work than my reef tank. The high lights/CO2/ferts caused tremendously quick growth which required constant trimming. The stem plants in the back were picked just for that reason, to out compete any algae that tries to take over in the beginning. I had to cut the "lawn" with scissors at least once a week which then required about 30 minutes of trying to collect all the pieces. It was ran with a wet/dry filter so that required weekly maintenance also. I was burning through quite a bit of CO2 due to the high growth and the use of the wet/dry filter.Nice tanks - do you dose CO2 to all of them? What ferts do you use? Maintenance schedule? I'll be working on a planted tank as well, so it'd be nice to hear what works...