I am thinking about using only carbonate hardness as a source of carbon for photosynthesis in my brackish water tank. Is Limnophila aromatica able to use carbonate hardness in this fashion? Some of the other plants are Vallisneria (they love it), Cryptocoryne parva and Java Fern. The light is mostly over the L. aromatica. Any advice on using this approach will be appreciated.
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