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HeyPK said:
Self-sustaining CO2 machine?? I guess from my plants' point of view, that is what I am. I discovered that the air I or anyone else exhales is about 3.5% CO2. I collect it in a large bag and pump it into my tanks. With a tight-fitting glass cover, I only have to do this every two days.
then what do you mean by this quote?

<----confused person ova hea
 
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