Agh! That darn water chemistry - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 03-18-2004, 08:58 PM Thread Starter
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I re-checked the ph and kh of my tap water and water that has been standing for a few days. It seems I don't have a ph of 6.8 but of about 7.6! Except my kh is still about 2 degrees. Do I need to add baking soda to raise the kh to add co2? It would be a big pain and I want to get my ph to about 6.8. Will my ph crash or is it high enough to be safe? Isn't that a weird combonations? High ph, low kh? My general hardness is also really low.
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post #2 of 4 (permalink) Old 03-18-2004, 09:03 PM
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I would say increase the kH before adding CO2. It will be better for your fish. Also, have a close eye on the pH both in the mornings and evenings, until you figure out how much CO2 you can add, and how much the pH fluctuates during the day.


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post #3 of 4 (permalink) Old 03-18-2004, 09:14 PM Thread Starter
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Will the ph rise alot from the baking soda? How much do I need to increase it?
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post #4 of 4 (permalink) Old 03-18-2004, 09:17 PM
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Quote:
Originally Posted by justincgdick
Will the ph rise alot from the baking soda? How much do I need to increase it?
My water is normally around a 6.8-7.0, it shoots up to 7.4-7.6 when buffering the entire tank with baking soda. This is when I raise my 55 gallons by about 1-1.3 degrees or so. The Co2 kicks down the ph level fairly quick though.

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