I currently have a 65 gallon tank but want to upgrade to a 180 gallon tank. I am asking for general information. I hate talking to the people at the stores because I get so much variation of information. I want to know what size heater, water pump, skimmer, and any advice on how to build my bio filter system. How this should I have my live sand be. I want this to be a reef tank, if that helps. I am trying to get as much info that i can before i dig in. Any tips on how to drill my my overflow holes and how to set that up. I want to buy just an 180 gallon glass tank and build everything for it. any information at all is greatly appreciated. Tips and advice as well.