Triggering Champsochromis Caeruleus into spawning

Male looks really good, how long did it take you to grow him out that big?

Another thing to think about with champs is that the females can be pretty stealthy when holding. Until they are ready to pop, you may not notice the female holding eggs. watch them eat, if one isnt eating, she may be holding. silversides are great, I diced them up.

Jason, I bred mine in a 7' - 210 gallon decorated with three large "boulders" and some smaller rock piles in the corners. I kept mine with Frontosa. By virtue of fronts general demeanor this made them "top dogs". I started with two males, and three females. In an odd twist, the smaller male killed the bigger male and spawned regularly. My tank was also in the basement where the only foot traffic was me.

As far as food? Pellets 90% of the time, with the occasional shrimp treat. nothing special there.

In my opinion, you have three issues, and one problem that you didn't describe, but I bet exists.

Tank too small
Too much traffic
Get another male, mine did not spawn until after someone proved themself.

And now the "I bet you have this issue". My guess as this is your show tank, it's decorated rather densely with real nice with caves, rocks etc. These are big fish. They stake out large areas when breeding. I'm betting based in tank size and the assumption of decor that you male simply can't define an area large enough to call his "Spot". As an example, my male was about 13" long. His breeding spot was the left side of the tank behind a boulder. This was an area roughly 18"x18" and all the way to the top of the tank.

Hope this helps.

my guess is that they may need a 6 foot tank to make them a bit ore comfortable

Champs are a spooky bunch. That is probably your main issue.