Originally Posted By: Dave Davidson1
Actually plant life does both take and consume oxygen. However, in a properly maintained pond(as versus an aquarium)the main sources of oxygen are sunshine, wave action(wind) and phytoplankton.


Natural aquariums do exist. Bulbs in the right spectrum to replicate the sun. One airstone to agitate the surface for gas exchange. Typically heavily planted with shrimp and some fish. Green water is considered undesirable in a natural aquarium.

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