So we've had fish for a few years and I've always been quite obsessed with having and watching them. My only issue now is as I'm going to university as of next year I can no longer keep the current tank I have. I want to get one I can take to my apartment next year although my trouble now comes with maintenance. There's going to be a lot of times I'll be very busy or away for a few days or weeks at a time and wont be able to take constant care of the tank. I also have no way of keeping these tanks plugged in for too long as my electricity budget is also quite tight so machine maintenance doesn't seem a viable option. Mine is a tank which I must feed everyday and clean around at least once a week. I've heard of people who have built self sustainable tanks where no work is required or tanks that can be left more than a month without any need to feed or clean. Can anyone give me some advice on a tank I can build with these specifications? I'd really appreciate the help.