Diy co2 with powerhead diffuser
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Old 07-23-2013, 06:48 AM   #1
zackariah
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Diy co2 with powerhead diffuser


So I'm going to set up a diy yeast co2. I plan to diffuse using an Odyssey ex100 power filter. From what I understand if I put the end of the air tube under the filter, in the sponge, the impeller will pull the co2 through the sponge giving the co2 more time to dissolve. Any bubbles left should get broken up by the impeller at the top and sent out in the tank to dissolve. Assuming my understanding of this is correct, if I put the filter on a timer to come on with the lights. Would that lower the amount of co2 dissolving into my water at night. Or should I not bother and leave the pump on all nite. As it is I have 0 surface agitation during light period and allot at night.
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Old 07-23-2013, 12:04 PM   #2
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Yes, that will lower the amount of co2 dissolving into your water at night. As to whether to leave the pump on all of the time, I would just keep a close eye on your fish and see how they do.

I use a powerhead as a diffuser, and I only have it on just before and during the time when the lights are on. I don't need it on at any other time.
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Old 07-23-2013, 03:52 PM   #3
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Looks like I'm going to have a late night soon.
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Old 07-23-2013, 04:35 PM   #4
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Quote:
Originally Posted by zackariah View Post
Looks like I'm going to have a late night soon.
Haha. You might. When I was first setting up my co2, there were a couple of times that I had to scramble to get my air pump going. If I hadn't been paying attention, I might have gassed my fish.
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Old 07-23-2013, 11:01 PM   #5
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Ive been running co2 day and night for about 2 years. No issues with fish, you should keep in mind that when you turn the co2 off at night you are also changing the pH in the tank, this constant though subtle change in pH could affect some fish. I have had many varieties over the years and no problems though.
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Old 07-23-2013, 11:54 PM   #6
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Originally Posted by jackalope5000 View Post
Ive been running co2 day and night for about 2 years. No issues with fish, you should keep in mind that when you turn the co2 off at night you are also changing the pH in the tank, this constant though subtle change in pH could affect some fish. I have had many varieties over the years and no problems though.
i would think that turning the CO2 off at night would lower the ph fluctuations. ie, without any plants producing oxygen, and with all of them producing CO2, the ph is already going to drop.

leaving the CO2 running at night would exacerbate that effect, or so my thinking goes.

of course, with a decent amount of surface flow, your dissolved gas levels would probably stay more constant with the CO2 left on throughout the night since the constant exchange will keep it pretty stable.
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