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Main reason is low light with co2 is a really poor balance! I've been there and done that and got very bad BBA and other forms of algae. You have to have the right balance.
So with low light you would be injecting co2 which in turn would leave excess co2 as the plants wouldn't gain the best photosynthesis in the light period! Having high light helps with that! I would never recommend having low light with co2
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Well it is always interesting to read other peoples advice, experiences & conclusions.
I don't doubt you gave what you consider an honest & helpful reply, but, I have run low light, high C02 tanks for nearly 40 years!
I have tried high light as well but for the first 20 years I used 2 x T8 now I use 2 x T5 but always high C02.
Of course my tanks are nothing amazing & I am not really a fish keeper, in fact I have not kept fish in my main tank for the last year.
I recently spent almost 3 months in New Zealand, I left my tank running 'home alone' with one T5 & two low watt LED household bulbs on for 7 hours a day.
I left the C02 running as usual & hoped my 5k cylinder would last. No water changes & no ferts for 11 weeks (the tank has a sump & auto top up) The tank looked a little pale & hungry but it was a jungle of untrimmed growth!
So yes low light, high C02 will work & it is even seems possible not to add ferts or do water changes for months at a time!
Not everything is in black & white & it is obvious that there are different approaches to planted tanks that deviate from scientifically proven methods.