DIY Co2, 14 PP for 55g amazing ! airstone all night

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Aquafamily

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Feb 27, 2010
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We have a moderately plated fresh 55 and have been running a diy 1 2 liter bottle with airstone bubbling up to return flow on filter
i tested this Am and seem to have close to 13pp of co2, is this because i left it on all night with the lights of course and the plants now need to use it up during the day.

Should i turn it off, or take out the airstone at night now that the co2 has built up

Several folks said it would never come up to 10pp or over, maybe becuase im not planted fully yet ?

what PP # is dangerous ?
my nitrates have been 10 not 20-30 ? so say that's bad ?
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