What size of tank would you go with for larger fish?

[kien]

Just don't forget to consider your ongoing maintenance budget. In my opinion there is a point where bigger is not always better. Bigger is also more expensive; time and money. More water means larger water changes, more salt, a larger more expensive skimmer, more lights, heating, cooling, etc..

For example, if today you had to the time, the space and money to set up a 150g 6 foot tank or a 500g 6 foot tank choosing the 500g because "bigger is always better" might not actually be better in the long term. The 500g tank is going to cost you more in time and money to maintain. This tends to be the cause of many tank shut downs.

Having said that, some people are perfectly fine maintaining larger tanks long term :-)