Zeus.
Fertz Meister
Please take a look at this video. He is using an inline diffuser (not reactor) and has 100% dissolution. He just uses a longer hose with a slight curve . This curve gives the time to co2 to dissolve into water before it reaches the output. This is because co2 wants to rise but the water presses it down so there is more time into hoses before the exit.
He also has a low BPS and DC is Green if he was aiming for a Yellow DC would it still be bubble free ?