CO2 (pressurized) in a ACF aquarium, is it possible?

[Mentat]

... Provided all the requirements are met, would a co2 system in anyway harm a frog?..

And what would those requirements be? I'm asking because have no idea what are the requirements to use CO2 in a frog's tank.

Before using CO2 on an aquarium you have to consider the benefits against the risks. What are your priorities in that tank? If the plants; then fish; shrimps, and/or frogs go second. If the former; then the plants go second. Myself would not set-up a CO2 system in a tank with my prized frog pets because if system goes wrong; they could get hurt.

I doubt someone has set-up tanks with frogs in them and flooded it with CO2 to see the effects on them; hence the lack of information on the subject. But an out of control CO2 injection system can lower pH too fast and to very low levels. Frogs breath off the air so they are not going to suffocate like fish; but if there are tadpoles in the tank; too high a CO2 level will affect them same as fish. Finally; consider that CO2 bottles have been know to leak. So a CO2 detector near the bottle is important to your own safety .

What about Do It Yourself CO2? I've tried to set a system up, but either there's an air leak or the recipe failed. Do you think the Do It Yourself CO2 would be just as bad?

CO2 is CO2 no matter the source. Setting a home made CO2 system with the wrong equipment can end up in a mayor tank or location disaster. Have read of more than one incident where the whole contents of the soda pop or similar bottle back-flushed into the aquarium or busted the bottle open spreading the contents into the location room .

If interested in a sugar/yeast generator; recommend acquire one of the available commercial kits with proper valving and a hard sided bottle that won't burst or collapses. Once you use the included medium; just buy the regular non refined sugar and yeast at supermarket and avoid the high cost of reffils .