just turn it off.



just turn it off.


Thanks for the fast reply. Will that cause extreme ph change during the day and night?

not really, the change is there but should not be that extreme. I turn of my CO2 at night as well and never have any problem. I believe other did the same as well.
in fact in my opinion, if you did not turn off, wouldn't the build up CO2 cause extreme pH change as well? Not to mention now all flora and fauna generate CO2.

What about those using DIY CO2? Sorry I'm also a newbie in this area![]()

Then I guess you do not have a choice except to turn it on 24 hours. depending on your bio load, you might want to add airstone at night.


Thanks Shadow. Needed some advice. Will only turn on my system when my lights are on

usually I turn ON mine 1 hour before and OFF 30 minutes before the light timer.

For me i usually turn it off in the night.
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