PH too Low

In my 23ish gallon tank my PH is swinging from about 8.2 to 7.67 at night.
My main display down the hallway fluctuates from about 8.2 to 8.

That is weird. how different are the two tanks in inhabitants? Perhaps there is more algae in the smaller tank by volume than you realize?

I assume down the hall doesn't mean in separate "spaces" - closed doors and what not...what's the air quality in Vegas like? perhaps fresh isn't so there? IDK...
 
sorry to all, but can a simple co2 scrubber to the air inlet of the skimmer help him?


Inviato dal mio iPhone utilizzando Tapatalk
 
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