For ten gallon tanks I do not think it is really necessary to build a so-called reactor. If you just increase the bubbles per minute it should be better.
I use a mini water pump for diffusing CO2. I have noticed it does better than you would think if the CO2 pressure is low. When it is low, it takes much more time to push a bubble through the tube, to be then spitted out by the pump's water flow. Thus, the bubble doesn't reach the flow, and the latter keeps dissolving the CO2. In an optimum case, the bubble will never (hardly ever) reach the flow, but almost. You can prove the generator is working if you put the tube in water and see it bubbling. The tricky part would be adding the right proportion of yeast to achieve it.
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