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Home: KOI Talk: Pond Water Quality:
why is my ph higher?

 





 


Scout
Koi Lover

Jul 23, 2007, 3:39 AM

Post #1 of 5 (1113 views)
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why is my ph higher? Can't Post
My ph is pretty stable at 8.4-8.6 but the water I use to fill the pond is 6.9-7.2 Does anyone know why the ph raises so much in my pond? I have a 40 mil liner with a little concrete to hold some stones. I would like to lower it for my Hi but I don't want to use chemicals or acid.
Thanks,
Ken


koiguyoz
Member


Jul 23, 2007, 6:28 PM

Post #2 of 5 (1095 views)
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Re: [Scout] why is my ph higher? [In reply to] Can't Post
I have a strong feeling that your concrete is adding to the rise in PH levels.


larz1
Koi Kichi


Jul 23, 2007, 9:16 PM

Post #3 of 5 (1089 views)
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Re: [Scout] why is my ph higher? [In reply to] Can't Post
I think Oz is probably right, but you might want to check your fresh water again. Pull a sample and let it rest for a few hours before testing. It is common for tap water to have low ph due to CO2 in the water. After the CO2 gases off the ph will go up.


Scout
Koi Lover

Jul 23, 2007, 9:24 PM

Post #4 of 5 (1087 views)
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Re: [larz1] why is my ph higher? [In reply to] Can't Post
I know concrete could raise the ph but at some point doesn't the cocrete stop doing that? The pond is about a year old.
Thanks,
Ken


larz1
Koi Kichi


Jul 25, 2007, 8:03 PM

Post #5 of 5 (1060 views)
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Re: [Scout] why is my ph higher? [In reply to] Can't Post
At "some" point it will stop leaching lime................... at what point is always a guessing game.
Have you tested your source water after resting it yet? You might be surprised how much it can change.

 
 
 



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