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12-11-2004, 12:33 PM | #1 |
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Kalk + Vinegar Addictive System.
to be more exact, its actually: Calcium Hydroxide (kalk) + Acetic acid (vinegar), which will give you calcium acetate. calcium acetate's importance in reef chemistry cannot be overlooked.
When you simply mix kalk with water, you'll get an aqueous solution of calcium and hydroxide ions, and of course, a great amount of heat too! The calcium ions obviously provide calcium to the tank and the hydroxide ions provide the alkalinity. It is important to note that corals can only consume alkalinity as bicarbonate, not hydrozide ions. fortunately, these hydroxide ions can react with the carbon dioxide (in the air and in the tank) to produce bicarbonate and carbonate. When you dissolve kalk in diluted acetic acid, not only you can achieve a better dissolution, the essential calcium acetate is produced. In solution, calcium acetate forms calcium and acetate ions. While the former has been discussed above, the latter provides a way to export nitrates. 5CH3COO-(acetate) + 8NO3-(nitrate) --> 10CO2 + 4N2 + 13OH- + H2O My formula for calcium acetate: 15mL of 5% acetic acid 0.5 teaspoons of calcium hydroxide 1 L of water. Vinegar in the market contains about 20% acetic acid (correct me if i'm wrong). Just dissolve 1 part of vinegar to 4 parts of water. Remember to monitor the pH closely when mixing this receipe. Good luck. |
12-11-2004, 12:37 PM | #2 |
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for those who wanna read more:
http://www.advancedaquarist.com/issues/feb2003/chem.htm http://web.archive.org/web/20030608...n=&RecordNo=181 have fun! |
12-11-2004, 02:22 PM | #3 |
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I tot you can get Vinegar in the market that are 5% acetic acid ? Bought mine from coldstorage , stated 5% acetic acid .
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12-11-2004, 06:22 PM | #4 | |
SiaoGu Gives You Wings
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12-11-2004, 06:51 PM | #5 | |
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12-11-2004, 07:16 PM | #6 |
SiaoGu Gives You Wings
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What I did is to add vinegar to kalk powder and make sure that there is always some residue left and pour direct into the tank.
The residue ensures that the Ca and KH added will be balanced |
13-11-2004, 02:56 AM | #7 | |
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13-11-2004, 05:37 PM | #8 | |
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14-11-2004, 07:12 PM | #9 | |
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Bro,
You mean with this method you don't need to drip anymore? I know that saturated KW is about pH 12. Is it much lower in this case which is why you don't need to drip? Quote:
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14-11-2004, 07:40 PM | #10 | |
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