I am in love with your entire setup from the tank to the holes in your cabinet for the eheims tubes and light stand.
You need 36 psi for the atomic diffusers to work. Also I don't think that airline tubing will hold up for that psi and will balloon. You may want to get some PU tubing. It will be tough to put on but just heat it up with a blow dryer or heat gun if you have it.