If you'll think this design works, I beg to differ. Do consider the following:
1. As there is not much pressure from the DIY yeast and sugar mixture, the Pressure form the powerhead is pushing the water out from the Ista Mixer through the air inlet. Thus, CO2 could not enter the mixer.
2. Even when you turn down the pressure of the powerhead, the mixer might not effectively mix the CO2 into the water.
If you ever choose to use this method, you will have to forego the mixer. Connect the CO2 directly to the powerhead air-inlet, but, you might need a manual air-valve to control the BPS. In this method, the powerhead creates intake pressure to draw the CO2 into the outlet of the powerhead. Do note that bigger bubbles of CO2 are being emitted into the water. The discharge of CO2 might not be as effective.
Of course there are other workable methods you can find throughout the web and forum. Do share your experience, hope this information will help some of us here who plan for this DIY.
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