You chop the potato into small cubes, place in plastic bottle.
Then add enough hydrogen peroxide to cover the potato cubes.
The lid needs to be drilled so an air tube can be run through it,
Seal bottle and place tube with or without an airstone in the tank.
Hydrogen peroxide naturally breaks down into 2 components over time, water and oxygen, the addition of the enzymes from the potato speed this up 100x
The escaping oxygen gas will travel up the air tube into your tank, providing pure oxygen to the water.
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