40b vs 55

[Glenn]

As ReturnOfSid mentioned, the 40b is a great 'gotta have' size tank - when you do your next upgrade (and don't we all), the 40b is a great sump .. I have one sitting under my 120 with a piece of glass that I glued in for a baffle. Great size sump for any larger tank.

 

[fishgeek12]

I would go for the 40b as well... the deeper tanks are always better for corals.. more real estate...

 

[JMSKI333]

40b for sure. 55 dimensions are terrible and are for like reptile tanks.