I don't know if this was posted before, but it just came to my mind while I was making my new yeast mixture for my CO2. I was thinking of using DIY yeast CO2 to auto dose liquid fertilizer. The amount of CO2 released by yeast is quite stable and the amount can be controlled by the amount of yeast initially added into the mixture. From the picture, I will explain how the method works.
1. An air tight bottle containing your yeast mixture is connected to your bottle of liquid fertilizer
2. Noticed that one tube is suspended above the liquid fert level, while the other is almost near the bottom of the bottle.
3. As the yeast release CO2, the pressure from the yeast bottle is transfered into the fert bottle, creating pressure in the empty space in the fert bottle.
4. As the pressure builds up, the liquid fert is forced down and into the tube, then up into your tank.
I have never tried this method nor seen anybody ever talking about it. I was just wondering if it'll work. Any comments or advice please