I don't have any high-maintenance plants, mostly low/medium light easy growers... Anubias, java fern, crypt and some mosses. ( I likely don't even need the Co2 to be honest)
I'm seeing some nice growth so far, but when everything is grown in and looking lovely, I'd like to remove the co2 to put it on another smaller tank. I would just hate to get everything grown in, only to have it all die off without the Co2
As for my lighting, I'm running 2 T5 HO grow bulbs at 54w each and 6400k, as well as 2 T8 6500k bulbs at 30 something watts each - this is on a 90 gallon tank, so I think this would be classed as medium light.
as far as algae goes - I'm ok with some so my Amano shrimp have something to munch on!