KH and PH question... - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 06-10-2005, 09:13 PM Thread Starter
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KH and PH question...

I am wondering how does one raise ph?I tested mine and it is 5.5! The fish are fine and I have a Carbo Plus (I know-but...) any way-Also how to raise the KH..Anybody?( the c02 unit is turned off and I don't know why my c02 levels are so high.)
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post #2 of 7 (permalink) Old 06-10-2005, 09:17 PM
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You typically raise pH by adding baking soda (Sodium Bicarbonate) or calcium carbonate (CaCO3). The problem is that the Carbo Plus uses the carbonates in the water to produce the CO2 through electrolosis.

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post #3 of 7 (permalink) Old 06-10-2005, 09:22 PM Thread Starter
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Hey Bill- nice tanks- How about KH(and should I get a fresh water PH buffer?)Thanks,
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post #4 of 7 (permalink) Old 06-10-2005, 09:32 PM
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Baking soda will raise both pH and kH. I cover it in my Guide.

1 teaspoon of baking soda will raise 50 liters of water 4į.
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post #5 of 7 (permalink) Old 06-10-2005, 09:50 PM
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Well, like Rex says, baking soda will raise KH (raising pH, too) as will the calcium carbonate (which also raises GH due to it's calcium content).

But for any of this to work you'll need to keep on top of it constantly bacause all the carbontaes you add to raise KH with then be converted to CO2 by the Carbo-Plus.

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post #6 of 7 (permalink) Old 06-11-2005, 03:48 PM
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Do you know what the KH of your tap water is? Generally if it's below 3, you'll have to raise it to inject CO2 in any form. Learned that the hard way! I used to live someplace where the KH was only about 1, and I could never figure out why my pH tests always read below the scale. Would have been great if I could have found some good cardinals.
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post #7 of 7 (permalink) Old 06-13-2005, 02:09 PM Thread Starter
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Yeah- not sure-haven't tested the tap water- did the baking soda and it whet up but then went back down the next day so did it again -same thing went down the next day- took out the carbon out of my filter system because i figured it was taking out the iron and potassium I was dosing,because I couldn't get a iron reading and whalla-the KH came up to 5 and the PH came up to 7.2 ???? the next day- so now the c02 is low...turned up the carbo-plus and fish seem to be happier..
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