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:hihi:

So, anyone else have a decent swing in PH on a daily basis. Mine goes from 5.3 just at lights/co2 out to around 6.0 just prior to lights/co2 on. Air stone running as the lights/co2 are shut down for the night. This change is gradual over the cycle, but just wondering if this is a prolblem.

Ted
 

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Yep I am
I am about 5-8 to 6.4 <overnight>
Not significant enough to cause a huge change. If you have your CO2 on a timer like I do, you may want to try and stop running tha airstone. If y our CO2 is off at night, and you have enough agitation naturally in your water, you will not need to run the airstone. That may exacerbate the delta you are having.
 
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