pH is low

Discussion in 'Chemistry' started by graciesdad, Oct 1, 2020.

  1. graciesdad

    graciesdad Treasurer Staff Member

    Since adding the apex, I've been really monitoring my pH. I have mostly not cared much about pH before. But knowing corals grow better at pH of 8.4 definitely makes me want to modify. I've added some chaeto to the sump and added a co2 scrubber that is recirculating to my skimmer. I run calcium around 450 and alkalinity at 8.5. I usually test daily. Since adding chaeto and co2 scrubber, I haven't noticed pH increase much at all. I am not dipping down as much at night. With lights on, I'm lucky to hit 8.15. I'm right around 7.99 at night. Any thoughts on other things to try?
  2. huntindoc

    huntindoc RRMAS BOD Membership Director Staff Member

    Has it always been this low? What's the lowest it gets? If you're running a CO2 scrubber I can't think of anything else to do honestly. How recently have you calibrated your Apex probe? Since it's new that's probably not the issue but mine loses calibration pretty often.

    I wouldn't worry too much about it. There are some outstanding SPS tanks with pH levels where yours are.
  3. graciesdad

    graciesdad Treasurer Staff Member

    It has dipped as low as 7.79 before. I added the co2 scrubber and the chaeto, the following day. I'm definitely not having big swings in pH. I am going from 7.99 to 8.15. This looks really consistent. But consistently low. I've considered slowly raising my alkalinity to 9 and trying to keep it there.
  4. portereef

    portereef RRMAS Supporter

    Man its fine! don't chase the pH if the co2 scrubber isn't getting it done then its fine. My system doesn't get that high ever my high pH is 8.1
    huntindoc likes this.

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