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Old 09-11-2005, 03:50 PM   #1
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Hagen CO2 System

I'm thinking of adding this system to my planted tanks.

http://www.drsfostersmith.com/produc...&N=2004+113779

I have two 5-gallon tanks beside each other. Can I use a T-connector in my tubing to use this reactor for both tanks? I would rather put the reactor in the corner behind the tanks, instead of clipping it to the tank rim as shown. Would that work?

Also, the ladder may be a bit big for a 5 gallon. From the pictures I've seen, it looks like it would be as tall as the tank. Would this diffuser be any better? It looks like it's only a few inches tall in the picture.

http://www.drsfostersmith.com/produc...&N=2004+113779
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Old 09-11-2005, 04:19 PM   #2
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My ladder is 7" tall. Including suction cups it is ~8 1/4".

If the lines are equal distance it may work, but I don't know if you'll get equal amounts in both tanks. When I used two passive diffusors I had them in separate tanks (shared water system), and would get more output into my ladder than into my bell with different length tubing, fwiw.

If you're shooting for high and stable CO2 consider using two 1L or 20oz soda bottles with alternating mix changes for more consistent output.
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Old 09-12-2005, 11:25 AM   #3
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Seachem's Excel might be what you need for a 5g. It's:

http://www.seachem.com/products/prod...rishExcel.html
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Old 09-12-2005, 04:29 PM   #4
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its gonna be really hard to get even CO2 flow to both tanks. I tried it with pressurized, and just the change in water pressure from having my hand in the tank (to raise/lower the ladder to achieve balance) would throw it off, and pretty soon I had 2bpm in one tank, and 50bpm in the other.
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Old 09-12-2005, 11:57 PM   #5
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Thanks, everyone...I didn't realize that the distance of the reactor to the tank, or trying to use one reactor for both tanks, would create an imbalance of CO2. But it makes sense - it's only a tiny little reactor. Ok, then - to get the most benefit from the system, I'll try one kit on the tank with the worst algae, and then purchase a second kit for the other tank.

Thanks too, Left C - I have currently lowered my lighting intensity a bit, and I'm using Excel this week, 1/8 teaspoon a day. I'll see how that affects the algae, then think about the Hagen system if necessary. But right now, the score is Algae 1, Plants 0. No, make that Algae 10, Plants 0 !!
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