Ok going to be getting my tank today there's three I got to choose from a 125 150 180. Just waiting to hear from one to go get it. There all 6 feet long just the width and height are different. So now do I try getting an ro di system? Or just use mix to get it going? I wanna start getting it going today and idk if anyone has a system near here so will mix just be ok if I can't buy one? Also what size sump would be good? And I want a fuge. So what size and how do I set them up? Just start with those questions for now! Lol