I used to have a 180 gal. tank about 22 years ago. I currently do not have any set up at all. I plan on setting up a new system in the next few months. First of all I need to re-educate myself because I forgot nearly everything. I will probably be looking at 150 to 180 gallon tank again. I am located in central Canada. I plan on doing a lot of reading before I make the commitment.