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Discussion Starter · #1 ·
question about a fully planted tank that has ~7.8 PH (KH/GH~6) when the lights are on (daytime) and at night I drop to ~7.0PH

is this ok for the shrimp? I do have some coral in my substrate.

Should I look at adding an air bubbler at night? Or coral to my filter media?
or just leave it alone .. they can handle it.

I would assume that this PH swing would be seen even in nature to some degree.
 

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Discussion Starter · #3 ·
shrimping around.. seeing as that is the normal PH for seattle area and lots of people here keep shrimp I assume that long term its also fine.

and yes I am aware of the very stable environment :) that's why I am asking how to help with the PH swings from the plants.
 

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If this is a Ph swing from injected CO2, then it's not a problem as they happen for different reasons. Don't remember the deails of it but did ask this question about a month ago on here as I've seen most who use injected CO2 say they drop Ph from in the 7's to low 6's each day and I asked why some people say it's very bad on fish etc to swing the Ph up and down but those same people sometimes have injected CO2 and say it goes from the 7's to the 6's each day.
The reply was something to do/w mineral content not being effected in the one that is caused by CO2 injection.
 

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Discussion Starter · #5 ·
no Co2 is added.

specifically, I see a drop due to plants no longer photosynthesizing. Ph is highest right after lights out due to the days photosynthesis and lowest in the morning due to respiration and the buildup of C02.

So I am seeing a swing of ~.8 is this ok for shrimp? should I look increase surface agitation to assist in gas exchange with the Co2 buildup? anyone know if coral as a buffering agent would assist in lowering this swing with out other side effects?
 

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Yes you will be fine my tank does this also (though not quite to that degree). Daily swings due to CO2 levels is much easier on livestock than rapid changes in KH or TDS. The pH swing you see at lights out is due to change in CO2 levels.
 
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