The Planted Tank Forum - View Single Post - Fishless cycle help
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Old 12-07-2012, 05:56 AM   #13
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"KH is 0 and GH is around 180"

You do not need to add calcium to this tank. (GH)

Add carbonates. (KH)
Potassium bicarbonate is a source of carbonates that does not add more sodium to the water.

You could just add baking soda. Go for it.
You will be doing a water change before adding fish, so I would not worry about the sodium level while cycling.
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