A practical reference for hydrogen water preparation at 3000 ml/min:
Run hydrogen tube into the water. Leave the oxygen outlet open for oxygen to release into ambient air.
500 ml water: 5–6 min 1000 ml water: 8–10 min
Hydrogen escapes rapidly. Consume right after production, ideally within 1 hour. 
Disclaimer: Technical guide only, for educational use. Not medical advice. No health or treatment claims. Hydrogen is flammable; ensure good ventilation during operation. 
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