The Hagen CO2 PowerLadder.... - The Planted Tank Forum
 
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post #1 of 2 (permalink) Old 11-05-2005, 04:56 PM Thread Starter
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The Hagen CO2 PowerLadder....

last night i tried another experiment, but it didn't seem to work well, still needs some fine tuning....

on the right hand side of the tank, right next to the Hagen ladder, i have a Penguin 550 powerhead with an AquaClear 70 sponge jammed on it, turning it into a powered sponge filter, the 550 has a venturi port on the output spigot where you can run an airline hose so it can pull atmospheric air into the tank to increase aeration...

so i got to thinking....

i can take a section of airline hose and stick one end into the venturi port, and the other end into one of the holes at the side of the ladder diffuser near the top, as the tiny bubble (tiiiny bubbles....in the tank.... ) of CO2 reaches the top of the ladder, it'll be pulled into the water stream from the powerhead and shredded into even tinier bubbles....

in theory, it worked fine, in practice, well lets just say i'm still fine-tuning the intake tube, a square cut at the end of the tube ends up blocking the CO2 from travelling further up the final rung of the ladder and causes a big puddle of CO2 to "pool" at the airline hose until it "blorps" out

i figure an angle cut in the airline tubing should give the CO2 the ability to pass above the airline tube and get sucked into the output and shredded

an alternate version would involve me running the airline tubing into the intake at the bottom of the filter for more efficient shredding by the impeller, rather than shredding by the water stream exiting the filter....

i just tried a 45 degree cut in the airline tubing, it solved the "pooling" issue, and the PowerLadder is working again....

and some pics of the hacked ladder....





looks like Goldrush gives it his "Fin of Approval"...
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post #2 of 2 (permalink) Old 11-06-2005, 01:22 AM
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I have done similar things, like placed a powerhead above the ladder, or combined two ladders. Works fine, until you realize that the bubbles that you are trying to catch don't contain much CO2. By the time they are up the ladder they are mostly oxygen or (with fresh DIY setups) air.

Circulation is the key... whether you catch the bubbles on the top and do anything with them or not won't make a difference.


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