| | Re: 29 gal tank.
As for the diy Co2 as you can see i used two empty and cleaned soda bottles.
Use 1 cup of 105 F. water nothing over 110F yeast will die and a half tsp dried yeast.
Fill a soda bottle half way with hot water and two cups of sugar. Let cool until look warm again nothing over 110F. The yeast will take 5-10min to bloom.
You can add the yeast mixture to the water solution.
Use airline tubing sealed into cap of bottle. Then go into a back flow preventor. Into the tank with a difuser like an airstone. I had mine going into my intake of my canister filter.
I am now have a preasurised Co2 system with a diy co2 reactor.