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Old 07-17-2011, 11:41 AM   #1
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PH and surface agitation

Just did a ph test on my 125g and find that its dropped from 8.3 ish to about 7.8. :-(

Isn't there a direct correlation between surface agitation and ph levels? I have intense surface movement and am also keeping my refugium light on 24/7 now. Could that have something to do with the drop in ph? I can't pinpoint when the ph dropped, had to be in the last few days since I test usually once a week.

Any thoughts or ideas guys?

Thanks very much!!
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Old 07-17-2011, 11:58 AM   #2
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Ph and surface level aggitation are directly related our 6 footers are supposed to be extremely good at gas exchange. Here's a helpful article that scottayy showed me

Low pH: Causes and Cures by Randy Holmes-Farley - Reefkeeping.com
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my 125g Sw...Round 2!http://www.aquariumadvice.com/forums...220171-33.html
ever see someone cut a 125g in half??
http://www.aquariumadvice.com/forums...-286438-4.html
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Old 07-17-2011, 12:12 PM   #3
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Good link. I'm gonna go check my alkalinity and see if it's low.

Thanks very much!
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I have a mix of many different saltwater fish amongst my tanks, but I love my Tangs most of all.
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Old 07-17-2011, 12:18 PM   #4
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Yeah hopefully your alkalinity is higher, low buffers are a common cause of ph swings good luck
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my 125g Sw...Round 2!http://www.aquariumadvice.com/forums...220171-33.html
ever see someone cut a 125g in half??
http://www.aquariumadvice.com/forums...-286438-4.html
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Old 07-17-2011, 12:31 PM   #5
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Tested out at 8.9. So it's low but not horrific. I don't dose anything now so now I'm wondering if I should start. I don't use any ph regulators or buffers either.

Is this a sign that my corals are using up the nutrients in the water too quickly?
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Old 07-17-2011, 12:48 PM   #6
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I couldn't give you an honest answer as to if your corals are or aren't using them up. But I'd prob try to stay away from dosing for it. It'll more than likely just de-stabilize it even more. Perhaps you could test your rodi water and see what ph you get, naturally if its higher than your tank, pwc's will take care of it, if its lower, well then there's an issue
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ever see someone cut a 125g in half??
http://www.aquariumadvice.com/forums...-286438-4.html
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Old 07-17-2011, 12:54 PM   #7
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I didn't even think about it, I did a large pwc yesterday. That might have done it.
I'll go see if I have any water left and test that. If I didn't use it all up. I would be testing saltwater correct? Or just regular ro/di water?
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Old 07-17-2011, 01:51 PM   #8
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I'd do saltwater, I believe the salt can change your ph so yeah
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my 125g Sw...Round 2!http://www.aquariumadvice.com/forums...220171-33.html
ever see someone cut a 125g in half??
http://www.aquariumadvice.com/forums...-286438-4.html
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Old 07-17-2011, 01:54 PM   #9
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Not just the water, but how is the air circulation in your home? If your running A/C all the time and not opening any windows, the air in your house may have a lower O2 content, thus causing your PH to drop.
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Old 07-17-2011, 01:56 PM   #10
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I do run the a/c 24/7 and don't have much open window time. i was thinking that may have something to do with it as well.

I'm gonna test my other tanks for their ph and see if its the same story. Does freshwater work the same way as far as ph?
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