Your foam dun look it is enough to trap the detritus. Looks like some of the water is bypassing the foam. Can see that some of the waste is already washed over to the pump compartment. If this is the case then your filter media will most likely be trapping some of it too. In the long run this will not be good for the media and the tank as well.
Wow sure looks like coffee. Skimmer is really doing a good job. But this amount in less than a day? Your tank dun look that overloaded so how come this much? Is it normal?
The contrast now is of course caused by all th new rocks, sand and the use of a light meant for planted tank. Any plans to change the lights? Also how do you plan to keep the rocks and sand so white or are you intending to let it attain a more aged look.
As the saying goes there are many ways to skin a cat. Some are costlier while others takes a longer time but cheaper. So really depends on how patient you are. As a matter of principle I will never use a life fish to cycle a tank. And in any case when a tank is cycled that does not mean that there is a full colony of bacteria to handle a full load of livestock. I beleive that the maturing process goes on as we stock the tank.