NEWBIE - HELP please [emoji3] CO2 and REACTOR

[louienardi]

Hi all. Looking for some help. Just finally set up my CO2 and a reactor. Not sure if I should just default to the diffuser (which I have). Wondering if I did this right before I lock down and clean up the “look”.

Trying to understand if I did this all wrong lol.
No micro bubbles in the tank