Well it's been a week & a half since the 4 dead fish were put in. I took a water sample to my LFS plus tested myself daily and ammonia, nitrite, and nitrate all read 0. The LFS suggested we put 3 Springer damsels in. They've been doing fine for 4 days. Feeding 1/2 cube of misys shrimp daily. I'm still testing daily and there is no ammonia, nitrite, or nitrate to be found.
Just to give a bit more background, the tank was set up almost 4 weeks ago with dry rock, some of which came pre-sprayed with bacteria, and CaribSea Arag-Alive sand. During setup the LFS guys added Seachem Matrix Biomedia 4L, Seachem Denitrate 4L, and had us put in Seachem Aquavitro Seed Bacteria daily for a week. During this time we thought they had also put in an ammonia source, but there was a miscommunication and the expectation was that we would put in some table shrimp. It was only a week & a half ago that we realized there was no ammonia source in the tank, and that's when they gave us the dead fish to start the cycle. They also had us add more Aquavitro Seed for 4 days. When the readings were all still zero a week later, they suggested the damsels. Is it possible that between all the bacteria and the Denitrate that it's taking care of any ammonia, nitrite, and nitrate before they can get to a measurable level and that's why we're not seeing a cycle?