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Old 05-29-2006, 12:51 AM   #11
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Water with a pH of 7 or below is generally rather low in KH, hence the nuetral to acidic pH due to the absence of carbonate to buffer the pH higher. From what I have read, nitrifying bacteria are significantly impaired by a pH of less than 6.5, and nitrification stops at a pH of 6.0 (note that this won't kill the bacteria right away, but conversion of ammonia to nitrate will stop). So, pH below 6.5 would be expected to take longer to cycle. Yes, nitrification is a slightly acidifying process. It is harder to have a stable pH with low KH water.
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Old 05-30-2006, 11:46 PM   #12
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my ph on both tanks is back to 6.0 both tanks have a some limestone as decorations, i have two pieces that are bigger than my hand in my 10gal and my ph is still low. my newly cycled 75 has some small pieces but not much and is also at 6.0. do i need to add baking soda and if i do, how much per gal, all the fish seem fine and no ammonia or nitrite, if i do a pwc the ph goes up a little but after 24 hours it fall right back.\


what do you guys and gals think
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Old 05-30-2006, 11:50 PM   #13
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I have heard its best to let it set out for 24 hours, but oddly mine didn't show any difference after 24 hours, I think its because I used a container with a lid lol
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Old 05-31-2006, 12:18 AM   #14
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how much baking soda do you add per gal to slowly increase to say 7.0 over a week period i guess

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Old 05-31-2006, 12:33 AM   #15
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http://dataguru.org/misc/aquarium/calKH.asp
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