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I have noticed this ever since I have planted Limnophila indica in my tank, that it "opens" its leaves in the morning and starts to close them just before the lights go off (about 30 minutes to an hour). Does this correspond with lights or CO2 coming on and off?
When the plants close up they look exactly as if you were holding it upside down outside of the tank.
When the plants close up they look exactly as if you were holding it upside down outside of the tank.