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Calcium
I have come to the conclusion that I need to supplement my tank with
calcium. In particular, I am having a terrible time growing regular
old swords. Nearly everthing else thrives.
Currently I mix my water from RO with RO Right (or something like it),
as well as Baking soda and Epsom salts (about 1.5 tsp of each per 30
gal/US).
Since the goal is very soft water, I would rather not raise the GH
much, and I think I need the Mg in the epsom salt, so I was hoping to
replace the baking soda with calcium carbonate, which, if I understand
the chemistry correctly, would allow me to raise the KH without
raising the permanent hardness much.
Does anyone know of a source of calcium carbonate? Would, for
example, one of the reef calcium supplements serve this purpose?
Do I have the chemistry straight?
TIA
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