Well druluv, I'm happy to say that I have the exact same set up as you but ony a few more fish and more coral. It's been running for almost 3 years now with "NO" Skimmer and all parameters are great and the tank is thriving. I'm definetly believe its possible, the only thing I would suggest is the water changes, it seems to help alot, I belive it replenishes the nutrients in the water. I know it calls for no water changes for the ecosystem, but I do water changes occassionally and it seems to be workin great..........