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Thread: pH - kH relation?

  1. #1
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    pH - kH relation?

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    Hey guys, pretty newbie question:

    kH - 4.5
    pH - 6.5

    is there any way to lower the kH without affecting the pH? Since you the CO2 ppm is directly related to both? affecting one would affect the other correct?

    Basically i'm trying to get it to:

    kH - <2
    pH - 6.5

  2. #2
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    Quote Originally Posted by XnSdVd View Post
    Hey guys, pretty newbie question:

    kH - 4.5
    pH - 6.5

    is there any way to lower the kH without affecting the pH? Since you the CO2 ppm is directly related to both? affecting one would affect the other correct?

    Basically i'm trying to get it to:

    kH - <2
    pH - 6.5
    I afraid that is not way to reduce kH without affecting the pH.. But how come your kH so high? mi normally less than 1 still have to add things to make it increase.... i think you should be more concern abt the CO2 level rather that the kH, pH level...

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    what i know is that if you artificially manipulate your KH or pH to get the desired values, this does not mean that your Co2 ppm is okay. For example, if you use ada that will lower pH, you cannot use the chart anymore. I guess it is the same if you are tying to manipulate the kH values.

    Hope you get the general idea and what i am trying to say!
    ~ Ā q u ã O b s έ Ş Ş i ŏ ŋ ~
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    Hmm... so it's not a defined relation? My tank's using a pH controller

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    Its just two readings used to determine the amount of CO2 in the tank water. You can have a KH of 1 and pH of 6 or KH of 3 and pH of 6.5 but the CO2 is relatively the same. Some plants might prefer low KH but then again, our tap is low in KH. No need to blend with RO water and etc.

    Don't use the pH controller but rather use it as a pH monitor just for monitoring purpose. High CO2 24/7 is bad for fish/critters especially during the later parts of the night where O2 is the lowest with plants adding none.

    Regards
    Peter Gwee
    Plant Physiology by Taiz and Zeiger

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    I believe XnS is trying to breed something. Hence the motive of the CO2 is not for the plants. Instead, it is to keep the water at a certain pH level and kH at a certain level.
    ~ Vincent ~ Fishes calm your mind...
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    The topic is under planted tanks???

    Regards
    Peter Gwee
    Plant Physiology by Taiz and Zeiger

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    erm... because i'm trying to breed something in a planted tank? That and i'm trying to move my emersed griffithii into the tank. But with a kH of 4 i doubt they'll survive.

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    Always focus on the base of the eco-system if you want things to do well. Plants when they do well provide loads of O2 for fish and bacteria, removes toxic NH4 as a nutirent as well as providing great hiding places for timid fishes. When the plants do well, the fish will too.

    Regards
    Peter Gwee
    Plant Physiology by Taiz and Zeiger

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    Plants are doing well, just that i want to see more than C. ponte-something and Blyxa auberti in the tank.

    And kH is essential in the survival of the eggs. Too high and the osmotic pressure causes them to burst.

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    Quote Originally Posted by XnSdVd View Post
    And kH is essential in the survival of the eggs. Too high and the osmotic pressure causes them to burst.
    Nonsense....If that is the case, you won't see fishes in natural biotopes since the KH is often nil.

    Regards
    Peter Gwee
    Plant Physiology by Taiz and Zeiger

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    Quote Originally Posted by XnSdVd View Post
    And kH is essential in the survival of the eggs. Too high and the osmotic pressure causes them to burst.
    Where did you read that from?!
    Water softness and acidicity is meant to trigger the breeding instincts of the fishes as in the wild, it is the change in the amount of fresh water entering the system so turning them on to start breeding...

    And osmosis thought is due to salinity? No?
    ~ Vincent ~ Fishes calm your mind...
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  13. #13
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    Ahh.. i got it backwards. kH that is too high causes the eggs to suffocate. Either way, i still need to lower my kH.

    Read:
    http://www.discusnada.org/discus/water2.html

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