Quick update. I did remove 35 pounds of live rock but left 20 pounds in the tank. This allowed me to siphon the sandbed thoroughly and roughly did 20 gallons worth of dark brown water change. I did add some new arogonite ontop of the sandbed and mixed it a little. This was a three day process and after the tank cleared, I added a some more fish and a cleaner shrimp. As of today, nearly a week later, all are still living and the two snails I added are cleaning the rock of any left algae and so are the two tangs and angel that were added. The tank looks much better and really like the additional swimming area that I created not to mention I did not build the rock up against the back of the tank so now I can see all around the rock and it creates a great swimming channel. Thanks for the recommendations.