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Thread: alkalinity

  1. #1

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    Question alkalinity


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    Our Ph is between 8.2 during the day and drops to 7.9 when the lights go out. Our Alkalinity is 11 dkh. Can the alkalinity go higher, should our Ph be higher? How high is too high for the Alkalinity. We have a saltwater reef aquarium with fish and invertebrates. Any help would be appreciated.

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    If you have a sump run the lights on a reverse cycle from the main tank lighting. That should keep your ph from swinging around like that.

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    yep, halelorf hit it

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    Quote Originally Posted by Halelorf
    If you have a sump run the lights on a reverse cycle from the main tank lighting. That should keep your ph from swinging around like that.
    Expand on that please. What do you mean by reverse cycle?

  5. #5

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    at night, run your sump light while your tank lights are off, and so on as reversed.

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    that only works if there is algae in the sump.

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    True. It requires that you are running somewhat of a refugium in order to reverse that pH swing.
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    What type of light should be used on the sump? Flourescents, halides, or actinic? We do have a small refugium that hangs on the tank and we leave that light on at night and it is out during the day, but our PH is still swinging. Should the alkalinity be higher? How high is to high?

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    usually i see power compact lights sideways on sumps, not 100% sure because ive never had a sump

  10. #10

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    Thanks for your help, it is greatly appreciated

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