So I see this popping up in a lot of threads and I don't want to hijack those threads.
There seem to be 2 schools of thought about tank sizes--some people are in the Bigger Is Better camp, some people are in the Small Is Beautiful camp. I see pros and cons to both, and thought we could bat ideas and tips for each around here.
I like little because I live in a small space, I don't have a lot of money, and I mostly like small fish.
In defense of the Small Is Beautiful camp:
Tiny tanks can easily be disrupted by small things--like ONE dead snail--but they can also be corrected rapidly.
A 30-50% water change takes minutes, you aren't too tired to tackle it after work.
Fish, plants, and equipment are (or can be) cheaper.
FINDING that dead snail is not a herculean task.
Big, static tanks can become a chore, and people leave the hobby for that reason also.
To be fair, if I had the space I would LOVE a giant tank. I would also like a Victorian conservatory attached to the side of my house. A maid, and perhaps a view of something other than the highway. But until I strike it rich, I am really good at making tiny work. The learning curve may be steep, I may have a lot of frustrations at times, but if the only option is between a 55 gallon or nothing I would be forced to choose nothing. Some fish>no fish.
So the question for me is not what size tank to offer newbies, but how to lower the bar for anyone who is interested.