I want to get either a 75, 100, or 125 gallon tank, I haven't decided yet, but I do not have the experience to have a large tank like these yet (the biggest tank I have is a 55), so I am asking for opinions on the best filtration to have in these size tanks........I have read that canisters are pretty good, but having a sump is a good way to go as well. I would like some feedback on this if there is anyone willing to share their experiences with me, I would appreciate it!