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Thread: pH problem

  1. #1
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    pH problem

    About 2 weeks ago, I replaced a small HOB 'fuge on my 29G tank with a 10G gravity return tank with reverse cycle lighting. I also used a couple of doses of B-Ionic (to raise calcium and alkalinity). Today, I checked the pH and found that it was 7.76 (using a meter). Normally, it had been running about 7.9-8.0. I would have expected these changes to raise the pH not lower it.

    Any thoughts about why it has gone on and what (if anything) I need to do?
    Nick

  2. #2
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    well i haven't got a SW up and running yet but in my hottub when you raise the alkalinity PH follows close behind known as PH bounce so i would assume that in saltwater it would be similar... hope that helps ..... hey this is my first post

  3. #3
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    oh yeah "bounce" could mean up or down :jump2:

  4. #4
    Senior Member reefmutt's Avatar
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    Nick, test your alkalinity and calcium levels- maybe you over dosed the b-ionic and precipitated some elements which lowered the ph.
    Also, recalibrate the ph probe.
    Did you use new aragonite gravel in the new sump? Sometimes aragonite will act as a crystalization site for calcium and alkalinity when it is first put in the tank and this can temporarily lower ph.
    Matt.

    Old system torn down to make a playroom.. planning a 62x42x28 high

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    Good ideas. Given the amount of B-ionic I added, I doubt that I over-dosed that. However, I will re-test and re-calibrate on the weekend (when my work pressures settle a bit). I did add some new sand (Bomix) and gravel the 'fuge. Perhaps that could be related. Hadn't thought about that aspect.
    Nick

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    wouldn't doing that cause a cycle?:errr:

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    Why would it cause a cycle? The sand and gravel are not live so there would be no new die off.
    Nick

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    forgive me if i'm wrong but can't a cycle be growth too?

  9. #9
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    It's nearly 1:00 am here and my brain is threatening to go on strike. Can you explain your thinking on this a bit more? Do you mean macro algae growth might produce a cycle? or something else?
    Nick

  10. #10
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    well like i'm just a noob here but yeah doesn't groth start some what of a just you may call a cycle ..... new sand in fudge and new bacteria that sort of reasoning

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