DIY CO2 question - The Planted Tank Forum
 
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post #1 of 5 (permalink) Old 12-24-2004, 04:27 PM Thread Starter
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DIY CO2 question

hey guys.

i built the co2 system this morning and i've noticed that the bubbles coming out of the airstone are going inside the powerhead pump and they come out from its input, instead of pushing them out of the gravel kit and through the foam

can someone explain what i did wrong???

my setup is :
powerhead is rated for 600 liters/hour when set to maximum (as it is right now), 1/4 teaspoon yeast, 2 1/2 cups cane sugar and water, 2 x 2L bottles connected together.

thanks in advance
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post #2 of 5 (permalink) Old 12-25-2004, 02:13 AM
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try useing higher flow foam.. your pump seems pretty tough but if the foam is too thick and dense it will inhibit the flow so much that the impeller only rushes water around itself and gives very little flow, so your co2 is building up in the impeller chamber and overflowing.. this is what happend to me anyway. i never solved it because until now ive givin up, but now im getting the kit on the go ill be useing a co2 bell..

you could use a co2 ladder for the yeast method. that should work well and there cheap

good luck
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post #3 of 5 (permalink) Old 01-10-2005, 03:17 AM
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I think that I may be running into the same problem with my DIY diffuser...built it & set it up this afternoon and the powerhead just isnt pushing anything...just a slow drip into the tube. I have no idea of the power of the powerhead. I pulled it out of the "misc" box of old aquarium stuff. Now I have a 3" pocket of co2 in the tube. Do I just need to invest in a new stronger powerhead?

Bob
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post #4 of 5 (permalink) Old 01-10-2005, 03:39 AM
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Even weak powerheads will create quite some flow, enough to push bubbles around. If the bubbles go into the powerhead and come out through the input, I would suggest the powerhead is attached backwards...


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post #5 of 5 (permalink) Old 01-10-2005, 01:52 PM
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I'm 100% sure that I have the powerhead hooked up correctly. With a 3" column of gas in the tube, there has to be quite a bit of back pressure trying to escape upwards at the same time that the powerhead is trying to push downward and the powerhead is just not winning the push-of-war.

Bob
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