How do you water and a co2 question

Some use low neut levels and say they don't need any run off. Some people like to feed one to two litres daily while others like to feed until 20% run off around once every 3/5 days. Some people feed with high neut strength in one feed but only water in the next etc.

What is your technique, what have you tried that didn't seem to work.

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A second very unrelated question is about co2. Defoliation of leaves is not a good idea in 99% of situations but what does seem to be up for debate is removing the lowest sucker branches themselves, those that have under developed buds and also leaves. A lot of people will choose to remove or ignore those sucker branches on a preference basis.

Question is, do those sucker branches use up co2 to sustain themselves and thus are stealing it from more productive sites. Or, does what ever co2 they use and energy they convert get passed up the plant regardless, while the sucker branch bud sites remain dormant.

As co2 likes to sink to the ground perhaps it could be of issue, although airflow should cover for that it would no doubt have some effect if the sucker branches are wasting/restricting some before it can be circulated.

lower leaves are not stealing c02 from the room or fro mother leaves in the vicinity. they dont feed "each to its own" . dont concern yourself with these type of details, really. if you need more c02, augment, if you need more air flow, buy more fans. sucker branches dont remain dormant. they produce nice little buds that stone with the best of them.
control air, temps, c02 augmentation, feeding, water quality and par lighting, and you'll be fine. feed your soil ....those plants already know exactly what to do. best book on th esubject is the grow bible, read it and your mind will explode

If what I read is correct I propose in another kabillion years.... our marijuana plants will have only one leaf and one bud at the top of the plant, because of evolution right....they'll grow at night mostly, only need an led penlight, prefer cold temps to warm and love to grow with only urine in a washcloth in the tub, with the moldy bits in the corner generating all the c02 they need.