u mentioned co2 which reminded me that I will also be adding in a homemade co2 system that I saw online. It's the design with two milk jugs and a homemade yeast mix. I figure something like that would be easy to maintain and likely couldn't hurt any. Whatever co2 the system gives off would only benefit the plants. I am confused though about where I should put the end of the co2 hose. Should it dump into the res allowing the roots access to the co2 or do I want to dump on the leaves? My guess is the leaves.