CO2 differences - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 07-22-2009, 02:40 PM Thread Starter
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CO2 differences

I have two drop checkers on my 125 gallon tank. One side is yellow and the other is more blue then green. I have increased the flow on the blue/green side as it is the side with the least amount of flow. What is the best way to get an equal amount of CO2 in the tank?

Matt
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post #2 of 5 (permalink) Old 07-22-2009, 03:12 PM
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How are you getting the CO2 into the tank? Your best bet for a tank that large would be to have 2 CO2 inputs, one on each side.
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post #3 of 5 (permalink) Old 07-22-2009, 03:47 PM Thread Starter
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I'm injecting co2 using a needle wheel pump that t's at the bottom of the tank in both directions. The output is in the center of the tank and the input is on the side that is registering the lower amount of co2.
Do I need to change the input location for the pump?
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post #4 of 5 (permalink) Old 07-22-2009, 04:14 PM
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Getting uniformity in CO2 concentration all over the tank is mostly a question of water circulation in the tank. For big tanks it will obviously be easier to do with two locations where CO2 is injected, instead of just one. But, unless the water is in constant motion all over the tank, so whatever is in the water at one spot has to quickly get to all other spots, you will have a hard time getting that uniformity. The "boat propeller" type of powerhead, like Koralia models, move the most water, so using one or two of those to keep all of the water moving is a good idea.

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post #5 of 5 (permalink) Old 07-22-2009, 04:18 PM Thread Starter
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I now have two of the koralia on each side of the tank keeping the water moving. Hoping this will help.
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