Poll: pH - Where Does Yours Bottom Out Daily

Discussion in 'Reef Aquarium Discussion' started by dbl, Dec 7, 2017 at 8:07 AM.

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  1. 7.4-7.5

    11 vote(s)
    2.9%
  2. 7.6-7.7

    33 vote(s)
    8.8%
  3. 7.8-7.9

    163 vote(s)
    43.4%
  4. 8.0-8.1

    137 vote(s)
    36.4%
  5. 8.2+

    32 vote(s)
    8.5%
  1. dbl

    dbl It Takes Less Energy to be Nice Staff Member Team R2R R2R Supporter R2R Excellence Award Reef Squad Leader Build Thread Contributor Article Contributor Partner Member 2018

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    A while ago we featured a poll asking where your pH topped out on a daily basis. Thought it might be interesting to see where it bottoms out. I personally don't chase or actually worry about pH as mine tends to be pretty stable (8.1-8.3). But let's look at where others bottom out daily.
     
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  2. Daltrey

    Daltrey Well-Known Member

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    Just checked my apex. 7.9 to 8.04. Will start brs 2 part dosing soon so expecting it to go up. This is in a brand new house with my skimmer going to outside air.
     
    Last edited: Dec 7, 2017 at 8:15 AM
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  3. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Expert Contributor Article Contributor

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    For years my bottom was near 8.3 (top near 8.55) while replacing all evaporated water with limewater (and in an old home leaky to air). :)
     
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  4. Dan McNertney

    Dan McNertney Well-Known Member Build Thread Contributor

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    Not sure, one parameter that I don't test as its always changing.
     
  5. MMacro

    MMacro Well-Known Member

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    My tank is in my garage and my pH bottoms out at 8.2. I have fans on the vents to circulate the air when the garage doors arent open.
     
  6. Be102

    Be102 Well-Known Member

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    I notice my ph changes when I have my nights lower over night. What causes this?
     
  7. Randy Holmes-Farley

    Randy Holmes-Farley Reef Chemist Staff Member Team R2R R2R Supporter R2R Excellence Award Expert Contributor Article Contributor

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    By lower you mean less intense?

    pH changes are driven by changes in carbon dioxide in the water, and the biggest driver of that on a daily basis is photosynthesis consuming CO2 during the day (raising pH) and respiration producing CO2 all the time, including night (lowering pH).

    This has more:

    pH And The Reef Aquarium
    http://www.reefedition.com/ph-and-the-reef-aquarium/
     
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  8. Dubs83

    Dubs83 Well-Known Member

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    I seem to bottom out at 8.2 to 8.25 at night with a well ventilated basement sump.
     
  9. Charles4400

    Charles4400 Well-Known Member

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    Before I used a co2 scrubber and now currently a tube to outside air I had a really really low bottomed out ph at 7.66 at night. Now my lowest is at 7.81.
     
  10. Scorpius

    Scorpius Well-Known Member

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    Changed my response. My Ph/temp pen needs recalibrating. grr....
     
    Last edited: Dec 7, 2017 at 7:16 PM
  11. Shigshwa

    Shigshwa Well-Known Member

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    I used to bottom out at 7.9 running biopellets. Running a reverse fuge now, I bottom out at 8.05.
     
  12. Yuki Rihwa

    Yuki Rihwa Well-Known Member

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    I'm using API test so this time of day (5PM) at the intensity start ramming down until off time at 9PM and my PH is 8.2~8.4 and early morning right after light on at 6AM and PH is between 8.0~8.2
    *The tank located in my room with window open 24/7 all year long included winter time.
     
  13. swimer499

    swimer499 Member

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    I’m running a reverse light cycle fuge with dual CO2 scrubbers on my frac intake. Bottoms out at 8.15 normal high is 8.29. Before this my lowest was a constant 7.7 and highest 8.01. Apex graph always tells me when it’s time to replace co2 scrubber. House is less than 2 years custom built and I made sure they sealed it to help with my AC bills... now spending extra money on sodalime and fuge light.
     
  14. amazongb

    amazongb Well-Known Member

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    8.13 to 8.28
     
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