candymancan
Aquarium Advice FINatic
I say that less than a 55 is better for a first "big" tank because you don't have to change so much water out. It could take a couple of hours out of your day just to do a deep cleaning. Also there is the space issue. That was a big deal for me. But I agree about corner tanks. The only problem with those is the surface area of the water. It would be less oxygenated and would not be the best for live plants as the light penetration would be less. And the bigger the filter you have the more expensive replacement filters will be. Also there is a space and price issue. IMO. But, definitely look at used tanks. With a little tlc they will look brand new. But 55gal gives you a lot more fish options. Going from a 5 gal to a 55 gal could be a little tough so you might want to start off with like a 35 or a 40 just to get a hang of the maintenance. Although, if you do want to go as big as you can right away and can handle the maintenance I say go for it. It would probably save you money in the long run. There are pros in cons. The size really does not make much of a difference, so no it's not that important. Choosing what you want should be up to you. For me personally I didn't think I was ready for the transition from a 5 gal to something much bigger. But now that I have something bigger I love it! So much less work and so much more rewarding than a tiny little 5 or 10 gal. The only fish I feel like I can fit in the 5 gal is my betta!! The price was also an issue for me. That is probably my biggest reason for saying to do less than a 55. If you have the money to spend go for it! Do what you think is best. Good luck!
Corner tanks have the exact same or more surface area then a rectangle tank... unless you go to really small tanks like 20 or 30 gallon tanks, then a rectangle has a lot more surface area.. You are forgetting they are very deep (front to back)... Take this for example
The surface area of my 92g corner tank is 907 Sq inches, on a typical 90g rectangle its 864 sq inches, so my corner tank has more surface area then a 90g rectangle.. A 54g corner tank is 572 Sq inches of water surface area. A 55g rectangle is 620 sq inches. A 55g rectangle has only 50 sq inches more surface area then a corner 54g which isn't much
Aquarium Volume and Surface Area Calculator
This is just my smaller 44g pentagon, its surface area is about the size of a typical 30-40g 36 inch long tank. The reason is because while those tank are 36 inches long they are only 13 inches deep, this tank is something like 24 inches in depth.. Now look at my 92g tank. You see that top shot.. That glass top I made for it, it covers half of my bed almost and I have a queen size bed.
When you get to bigger corner tanks, the surface area is actually much larger, but when you get to smaller corner tanks or smaller hexagon tanks the surface area does get smaller.