Nice sun powered reef system you have. Please check out my friend 1200L rimless sun powered tank of amfynn, in the large tanks section. He has a massive frag tank too connected to the main system. the seteup doing very well and the corals showing great colour. We also have a 5000L sunlit tank by Bob the reef builder here in South Africa with massive sps colonies too. If I had my own house it would deffinitelty be sun powered.