co2 dropped my ph to 6.0 - The Planted Tank Forum
 
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post #1 of 7 (permalink) Old 02-01-2004, 06:18 PM Thread Starter
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i just installed a diy co2 system with a gravel vacuum reactor. anyway, it has dropped my ph from about 6.8 to 6.0. all my fish appear to be fine, but isnt this a dangerous ph level. if i up my ph, will it just drop back down again? is there a way to get the ph where i want it and then buffer the water somehow? suggestions? comments?
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post #2 of 7 (permalink) Old 02-01-2004, 07:24 PM
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That's a pretty low pH. What is the kH of your water?
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post #3 of 7 (permalink) Old 02-01-2004, 07:46 PM Thread Starter
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i cant test my kh or gh right now because my test kit is screwed up. the chemicals have set too long or something because it says to put so many drops in until green changes o blue but the drops are coming out blue from the bottle. guess ill have to buy a new testkit. is there any way i could raise the ph and keep it there?
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post #4 of 7 (permalink) Old 02-01-2004, 11:16 PM
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Once you know your kH and find it to be low (<4 degrees) you can raise it up using baking soda, which will stabilize the pH.

Is it possible that you are pumping in too much CO2?


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post #5 of 7 (permalink) Old 02-02-2004, 03:21 AM Thread Starter
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i got my kh up to 5 by adding baking soda. my ph is now 7.0. what is the ideal kh? is this high enough to keep my ph at 6.8 or 7.0? also, if i have altered my kh in the tank does that mean i need to raise the kh in the water i put in when i do a water change? how much baking soda should i add to my tank at one time without it being harmful to fish?
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post #6 of 7 (permalink) Old 02-02-2004, 04:20 AM
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The ideal kH is 5 :mrgreen: With a pH of 6.8 to 7.0, you have just that sweet spot CO2-wise.

Most likely your tap water has a low kH as well, so yes, with each water change, you will need to add baking soda to keep it at a certain level.


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post #7 of 7 (permalink) Old 02-02-2004, 06:56 PM Thread Starter
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ok. thanks for all the help guys. i really appreciate it....thanks again!
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