I have too many tanks as it is, but am thinking of a fish only with live rock. Thinking of a 75 gallon with at least 75-90 pounds of live rock, and a variety of fish. Question is, can i use simple HOB filters or cannister filters instead of creating a sump? Also, what fish stocking suggestions for a tank of this size? I would love to get a flame angel,a coral beauty angel, maybe a foxface lo, or a powder blue tang... i also like the royal gramma basslet or possibly a scott's fairy wrasse. Thanks for the advise. Bunker