ok guys marine keeper for 4 months now , with an 80 gallon a 18 gallon and my 9 gallon. the 80 is the one i will be changing i want a 8 foot tank or should i say the misses does. currently no sump,acadia series 3 with 2 15000k halides and the 2 tubes, skimmer,4inches of coral sand 60 kilos of live rock .so do i put in a sump if so im a sump virgin and what else should i upgrade on and how on earth do i put a 8 foot in exactly the same place as a 4 foot and what would the best dimensions be ..