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Re: [APD] CaCO3 per gallon

Is this what you wanted?  It's quoted from George and Karla
Booth's excellent website
 ( http://users.frii.com/gbooth/AquaticConcepts/ ) :

"One teaspoon (about 6 grams) of sodium bicarbonate
(NaHCO3) per 50 liters of water will increase KH by 4
degrees and will not increase general hardness. Two
teaspoons (about 4 grams) of calcium carbonate (CaCO3) per
50 liters of water will increase both KH and GH by 4
degrees. Different proportions of each can be used to get
the correct KH/GH balance dictated by the fish and plants
in the tank. Since it is difficult to accurately measure
small quantities of dry chemicals at home, a test kit
should be used to verify the actual KH and GH that is
achieved. "

Scott H.
--- Rachel Sandage <rachelsor at hotmail_com> wrote:
> Is there an approximation of thumb on how much CaCO3 to
> add to raise GH and 
> KH, such as 1tsp per 10 gallons will raise KH 1 degree
> and GH 1 degree?
> Thanks.

S. Hieber

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