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Re: [APD] Calcium Carbonate question
Calcium carbonate will only raise the GH if it dissolves in the
water. (Isn't that profound?) So, if you dump in a tsp of it and it
just settles in the substrate to dissolve very slowly as it tends to
do, the GH wont change at all.
On Jul 28, 2006, at 2:52 PM, Jerry Baker wrote:
> Stuart Halliday wrote:
>> I've recently added a small quantity of this powder to my 25 litre
>> aquarium in order to raise the GH above zero. (I live in a soft
>> water area).
>> Aquarium water is KH high and ph is around 7.5.
>> (I added some sodium bicarbonate a few days ago.)
>> However after leaving the water to clear for 3 hours, I tested
>> again and
>> still the GH is zero.
>> Am I doing something wrong?
> 1/4 teaspoon or so should raise your GH by around 2 degrees in a 25
> liter tank. If your test kit doesn't reflect this, then it may be the
> Jerry Baker
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> Aquatic-Plants at actwin_com
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