Working with CO2 on a large tank - The Planted Tank Forum
 
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post #1 of 4 (permalink) Old 12-25-2013, 05:24 PM Thread Starter
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Working with CO2 on a large tank

So it takes my tank a very long time to get the optimal amount of CO2 dissolved in the water so I'm thinking that I will just leave the CO2 on during the night and turn on some air pumps to compensate for the fish.

I have a 75 gallon but with the sump its usually at 90 gallons.

Does anyone else do this? Seems like I can keep it stable this way.

Jarod
I'm in the Saint Louis, MO area and always looking to connect with other planted tank enthusiasts.

75 Gallon low tech
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post #2 of 4 (permalink) Old 12-26-2013, 04:48 AM
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Whether you can do that depends on what lighting you have. If you have high light, you need to have the CO2 bubble rate set so the concentration of CO2 in the water is pretty close to the maximum the fish can live with. But, if you use that same amount of CO2 at night, with the lights off, so the plants will not be using any CO2, the concentration may increase above what the fish can live with. With lower light intensity, you don't need as high a bubble rate, so you can leave the CO2 running 24 hours, and just be wasting some CO2, but not harming the fish. In either case you need to have well oxygenated water, so the fish's tolerance for CO2 is high.

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post #3 of 4 (permalink) Old 12-26-2013, 05:22 AM
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What are you using for a reactor?
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post #4 of 4 (permalink) Old 12-27-2013, 12:08 AM Thread Starter
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Well, I have been experiementing with just turning oxygen on at night to help the fish and then whne the lights come on I turn it off

I have a Red Sea reactor and I think it works pretty good actually.. Just a lot of water

Jarod
I'm in the Saint Louis, MO area and always looking to connect with other planted tank enthusiasts.

75 Gallon low tech
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