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The water from our well is extremely soft and acidic. According to the
County Health department, it has a pH of 6.1 and total hardness of 19
mg/l. Tetra test kits give roughly the same result (pH 6, gH <2, kH <2).
It is wonderful for orchids and carnivorous plants, but it corrodes
our copper pipes. To prevent blue deposits in the bathtub, I run the
water for the house through an acid neutralizing system, which is
basically a big tank of calcite. That gives me a pH of 6.8-7.0, gH <4, kH
<2. Hmm, shouldn't the calcite raise the kH as well as the gH?
My previous experience with the yeast-CO2 method was in a town with hard
water, so I'm thinking I should bump up the kH of my water before I start
adding CO2 now. I'd also like sufficient calcium for shrimp to survive.
Can I get away with just adding sodium bicarbonate, or do I need to add
some calcium and magnesium, too?
nplummer at duke_edu