My new powerhead - Page 2 - Tropical Fish Keeping - Aquarium fish care and resources
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post #11 of 15 Old 10-02-2009, 10:14 PM Thread Starter
I kinda got it working for at the moment soon I will close the ventuir vent off and just run an air pump but for now i will deal with it.
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post #12 of 15 Old 10-05-2009, 03:56 PM
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Why run an air pump?

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post #13 of 15 Old 10-05-2009, 08:15 PM Thread Starter
I ran it to create an alternate source of oxygen. My powerhead was so power full it made my aquarium look like nothing but bubbles. The air pump that I'm using cuts the bubbles down to a minimum and looks beautiful in my tank.
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post #14 of 15 Old 10-06-2009, 07:53 AM
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Bubbles have nothing to do with oxygen exchange. Take a look at people who keep a lot of aquatic plants and have CO2 injection systems. They know that if you just set up a diffuser and let bubbles go right to the surface it has zero impact on your system. The only way to get the CO2 to diffuse into the water is to extend the contact time of the CO2 with the water for as long as possible. That's the reason for contraptions like:



It keeps the bubble in the water for as long as possible and works quite well. A bubble's surface area is just to small to diffuse any significant amount of gas into the water. The best way to get oxygen into your tank's water is through surface turbulence. You increase the surface area of the water by churning it up and promote more gas exchange. Your best way to to this will be to aim the output of the power head so that it churns up the surface of the water. Don't waste your money on an air pump if that's all you want it for.

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post #15 of 15 Old 10-06-2009, 09:38 AM Thread Starter
Thanks for the help Tyyrlym.
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