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post #8 of (permalink) Old 11-11-2012, 06:10 PM
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Join Date: Dec 2005
Location: Sacramento, CA
Posts: 19,683
I would run the CO2 into the inlet of the powerhead instead of in that weak venturi. The goal is to chop up the CO2 bubbles into very tiny bubbles, so they don't float up nearly as fast. I've done this with several powerheads and none of them have shown any damage due to the CO2. The way you have it now is a big improvement, but a bigger improvement is running it through the powerhead.

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