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A comment on Building a Home Aquaponics System: The Basics. Parent comment

Re:Building a Home Aquaponics System: The Basics by bluGill on Tuesday December 19, 2017 @05:13PM (#15964910)
Sunlight and air are inputs though. Most of what you take our of the system comes from changing H2O and CO2 from the air into a different form using energy from the sun.

There is the potential various micro nutrients, and minerals. However the vast majority of what the system needs is air and sunlight.

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Re:Building a Home Aquaponics System: The Basics by weberc2 on Tuesday December 19, 2017 @05:36PM (#15965085)
Right, but nutrients and minerals are still being regularly removed from the system--they need to be put back in order for the system to function. Their mass relative to the mass of other inputs doesn't change the calculus.
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