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Old 08/10/2018, 08:42 AM   #1
Aquavaj
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Can a large group of people cause a pH drop?

My tank rarely drops below 8.0 and usually swings between 8.2-8.4 but last night I had almost my entire family (15+) over and saw a sharp drop in my pH down to 7.85. I noticed a few corals wouldn't open up fully. The only thing I did last night was feed, dose daily .2ml vodka and changed out the sponge and filter pad. Nothing I can see that would affect the pH that much.

Is it correct to assume that the available o2 decreased because of the increase in intake and thus also an increase in co2? It was hot so had all windows closed with the AC too.


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Old 08/10/2018, 08:57 AM   #2
hegeh
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Theorically yes.. but im not sure if it will cause your coral not to open up.. hmm

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Old 08/10/2018, 09:37 AM   #3
ReefWreak
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Yes, it is very likely that this is the case. Many/most people see a pH drop in Summer/Winter vs. Spring/Fall when people have their windows open for the same reason. It depends on how tightly sealed your house is.

This is not unusual at all, however I do agree with hegeh that pH wouldn't case your corals to be unhappy. Check your other parameters.


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Old 08/10/2018, 11:17 AM   #4
dubmaneh
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Not sure about the corals staying closed, but absolutely with respect to the pH drop when lots of people over. Iíve seen it happen in my house. Lol!

When we open the windows my pH raises by about 0.4 within a few hours.


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Old 08/10/2018, 11:53 AM   #5
Aquavaj
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They have left the house a few minutes ago and monitoring remotely of the apex I'm already seeing the pH increase to almost 8. So my assumptions were correct. Hopefully the corals were just a little unhappy at that time. Everything else looks fine.


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Old 08/10/2018, 12:33 PM   #6
hkgar
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A large group of people will not cause a ph drop - unless they breath.

It is the CO2 that causes the ph drop. No breathing no CO2


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180 gallon, 40 gallon sump, 8 ATI T5's, MTC MVX 36 Skimmer, Apex controller Reef Octopus CaRx

Current Tank Info: Red Head, Yellow/Purple, Hoevans, Possum Wrasses, Kole, Purple & Atlantic Blue Tangs, Matted Filefish, Percula Clown, 4 PJ Cardinals, Swallowtail Angel
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Old 08/10/2018, 12:52 PM   #7
Tripod1404
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Quote:
Originally Posted by hkgar View Post
A large group of people will not cause a ph drop - unless they breath.

It is the CO2 that causes the ph drop. No breathing no CO2
Plus it has nothing to do with O2. I dont know why people assume O2 influences pH.


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Old 08/10/2018, 01:12 PM   #8
hkgar
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Although we breath O2 to live, CO2 is the breath of all life. It is the CO2 that all plant life deours in order to live. The wast produce is CO2. Kind of like plant feces. fertilizer.

Wierd thought


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180 gallon, 40 gallon sump, 8 ATI T5's, MTC MVX 36 Skimmer, Apex controller Reef Octopus CaRx

Current Tank Info: Red Head, Yellow/Purple, Hoevans, Possum Wrasses, Kole, Purple & Atlantic Blue Tangs, Matted Filefish, Percula Clown, 4 PJ Cardinals, Swallowtail Angel
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Old 08/11/2018, 06:55 PM   #9
Uncle99
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C02 mix with our water which in turn depresses PH.
Lowering the mix of CO2 in our water increases PH.
Simply brining in outside air into our homes and/or brining into our skimmers for mixes provides for the exchange of gases which can increase our PH...

Now I just don't pay attention to PH.....but I will open a window from time to time..



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Old 08/11/2018, 10:06 PM   #10
bertoni
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A large crowd in a house is a known cause of low pH. Teenagers allegedly have been caught having unauthorized parties that way.


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Old 08/12/2018, 08:51 AM   #11
hkgar
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A large crowd in a house is a known cause of low pH. Teenagers allegedly have been caught having unauthorized parties that way.
sneaky


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180 gallon, 40 gallon sump, 8 ATI T5's, MTC MVX 36 Skimmer, Apex controller Reef Octopus CaRx

Current Tank Info: Red Head, Yellow/Purple, Hoevans, Possum Wrasses, Kole, Purple & Atlantic Blue Tangs, Matted Filefish, Percula Clown, 4 PJ Cardinals, Swallowtail Angel
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Old 08/12/2018, 10:13 AM   #12
rvareef
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A large crowd in a house is a known cause of low pH. Teenagers allegedly have been caught having unauthorized parties that way.
party got busted from the pH probe


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