Im about to move and in a couple weeks plan on getting a tank going. I was thinking about a corner tank since it would be pretty stable and for some reason the fish I see in those seem so much bigger. I think its a magnification thing going on with the concave glass but I could be mistaken. I have a Petsmart locally and a few mom and pop style shops to browse but the employees cant answer alot of questions and I wouldnt exactly trust their answers. So educate me! I am thinking that I want to use sand instead of gravel. Also I would like some large rocks. Maybe some sticks to make it look like a lake bottom. Can I just grab some of the limestone rocks that are everywhere around here or will they jack up the water? So do you never change the water, just add some every now and then? A friend used to keep a couple gallons of water around that he would top off his tank with, is that more bogus info? How do you clean the tank if you never change out the water? Also, what filtration system do I really need? I read somewhere that a guy was using peat moss and had a blackwater tank. What the heck is that? I have had a rinky dink 5 gallon tank and some cheap-o fish but nothing really serious. I want around a 55 gallon tank. I know its a big step up, but I cant have a dog where I am moving. An aquarium will slide by I think. I actually thought about catching some bass to keep but I wouldnt know if that would work out. Anyways, thanks in advance for any help!