CO2 not fully degassing - The Planted Tank Forum
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post #1 of 4 (permalink) Old 04-14-2017, 05:37 PM Thread Starter
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CO2 not fully degassing

So I recently checked my parameters today after switching from a wet/dry sump to a filter sock set up for a week
dKH 11
dGH 14
tank water 13hrs AFTER co2 turns off 7.5 pH
degassed tank water 8.2 pH in a separate cup

co2 is on for 8hrs (1 pm to 9 pm, cerges reactor 4.5" x 20") pumping at 100ml/min. pH drops to 7-7.2 after 1hr, it's close to 6.6-6.8 pH by 9pm. Lights are on from 2pm to 10pm.

i guess my main question is if i should be worried? the fish dont seem to care about the high amount of co2.

now if i want to save on co2 can i just set the timer to shut off a few hours earlier? or would getting a ph meter be a better idea? how important is it to get a 1 point drop before the lights are on?


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post #2 of 4 (permalink) Old 04-14-2017, 06:44 PM
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I think it is common for tanks to not fully degas over night. Hence the reason to sit a bowl of water out for 24 hours or so to get the baseline.

My 120 is 7.4 when the co2 kicks back on the next day. Fully degassed it's 7.75


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post #3 of 4 (permalink) Old 04-14-2017, 08:37 PM
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Ph meter are not always trustworthy. Best to use the eyes and watch plants/fish.
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post #4 of 4 (permalink) Old 04-14-2017, 08:54 PM
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Quote:
Originally Posted by Nigel95 View Post
Ph meter are not always trustworthy. Best to use the eyes and watch plants/fish.
I would disagree. Get a $20 pH pen and start with the 1 degree drop.

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