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Originally Posted by Ah_ZhaN
bro, u never fail to amuse me...
I realy din regret up-ing U
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using airpump during lights off period will ensure that your fishes do not get co2 poisoning at night when the plants take in oxygen and give out co2.
this is the hazard of 24/7 co2 injection using diy co2.
those with solenoids time the co2 injection according to lights on periods (on half to 1 hr before lights on and off half to 1hr before lights off).
this will ensure that the water is co2 saturated when lights come on so that the photosynthesis process get a real good kickstart.
co2 off earlier so that the plants will use up most of the co2 in the water before the lights go off.